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1.
Ann Surg ; 280(1): 136-143, 2024 Jul 01.
Artículo en Inglés | MEDLINE | ID: mdl-38099455

RESUMEN

OBJECTIVE: We evaluated the association between Medicaid expansion and time to surgery among patients with early-stage breast cancer (BC). BACKGROUND: Delays in surgery are associated with adverse outcomes. It is known that underrepresented minorities are more likely to experience treatment delays. Understanding the impact of Medicaid expansion on reducing racial and ethnic disparities in health care delivery is critical. METHODS: This was a population-based study including women ages 40 to 64 with stage I-II BC who underwent upfront surgery identified in the National Cancer Database (2010-2017) residing in states that expanded Medicaid on January 1, 2014. Difference-in-difference analysis compared rates of delayed surgery (>90 d from pathological diagnosis) according to time period (preexpansion [2010-2013] and postexpansion [2014-2017]) and race/ethnicity (White vs. racial and ethnic minority), stratified by insurance type (private vs. Medicaid/uninsured). Secondary analyses included logistic and Cox proportional hazards (PH) regression. All analyses were conducted among a cohort of patients in the nonexpansion states as a falsification analysis. Finally, a triple-differences approach compared preexpansion with the postexpansion trend between expansion and nonexpansion states. RESULTS: Among Medicaid expansion states, 104,569 patients were included (50,048 preexpansion and 54,521 postexpansion). In the Medicaid/uninsured subgroup, Medicaid expansion was associated with a -1.8% point (95% CI: -3.5% to -0.1, P =0.04) reduction of racial disparity in delayed surgery. Cox regression models demonstrated similar findings (adjusted difference-in-difference hazard ratio 1.12 [95% CI: 1.05 to 1.21]). The falsification analysis showed a significant racial disparity reduction among expansion states but not among nonexpansion states, resulting in a triple-difference estimate of -2.5% points (95% CI: -4.9% to -0.1%, P =0.04) in this subgroup. CONCLUSIONS: As continued efforts are being made to increase access to health care, our study demonstrates a positive association between Medicaid expansion and a reduction in the delivery of upfront surgical care, reducing racial disparities among patients with early-stage BC.


Asunto(s)
Neoplasias de la Mama , Disparidades en Atención de Salud , Medicaid , Estadificación de Neoplasias , Tiempo de Tratamiento , Humanos , Femenino , Neoplasias de la Mama/cirugía , Neoplasias de la Mama/etnología , Neoplasias de la Mama/patología , Estados Unidos , Persona de Mediana Edad , Disparidades en Atención de Salud/etnología , Adulto , Tiempo de Tratamiento/estadística & datos numéricos , Estudios Retrospectivos , Mastectomía , Accesibilidad a los Servicios de Salud , Patient Protection and Affordable Care Act
2.
Breast Cancer Res Treat ; 206(2): 307-316, 2024 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-38580882

RESUMEN

PURPOSE: Patients with cancer receiving anticancer treatment have a higher risk of severe COVID-19 (C-19) outcomes. We examine the association between breast cancer (BC), recent treatment (systemic therapy, surgery, radiation), and C-19 outcomes. METHODS: Retrospective matched cohort study using the Optum® de-identified C-19 Electronic Health Record dataset (2007-2022). Patients with C-19 were categorized into: no cancer, BC with recent treatment, and BC without recent treatment and matched based on age, C-19 diagnosis date, and comorbidity score. We evaluated 30-day mortality, mechanical ventilation, intensive care unit (ICU) stay, and hospitalization. A composite outcome including all outcomes was analyzed. Multivariable logistic regression models were used. RESULTS: 2200 matched triplets (1:1:10) of patients with BC recently treated, BC not recently treated, and no cancer were included. Rates of adverse outcomes improved in 2021 compared to 2020. Compared to patients without cancer, those with BC recently treated had a similar risk of adverse outcomes, while patients with BC not recently treated had a lower risk of ICU stay and hospitalization. Using the composite variable, BC recently treated had similar outcomes (OR = 1.02; 95%CI 0.93-1.11) to patients without cancer, while BC patients not recently treated had better outcomes (OR = 0.66; 95%CI 0.59-0.74). Among patients with BC, chemotherapy within 3 months was associated with a higher risk of hospitalization (OR = 2.30; 95%CI 1.76-2.99) and composite outcome (OR = 2.11; 95%CI 1.64-2.72). CONCLUSION: Patients with BC have a similar risk of adverse C-19 outcomes compared to patients without cancer. Among patients with BC, recent chemotherapy was associated with a higher risk of hospitalization.


Asunto(s)
Neoplasias de la Mama , COVID-19 , Hospitalización , SARS-CoV-2 , Humanos , Femenino , Neoplasias de la Mama/terapia , Neoplasias de la Mama/epidemiología , Neoplasias de la Mama/mortalidad , COVID-19/epidemiología , COVID-19/complicaciones , Persona de Mediana Edad , Estudios Retrospectivos , Anciano , Hospitalización/estadística & datos numéricos , SARS-CoV-2/aislamiento & purificación , Adulto , Unidades de Cuidados Intensivos/estadística & datos numéricos , Respiración Artificial/estadística & datos numéricos , Comorbilidad
3.
Cancer ; 129(11): 1752-1762, 2023 06 01.
Artículo en Inglés | MEDLINE | ID: mdl-36920457

RESUMEN

BACKGROUND: The availability of safe and effective COVID-19 vaccines has enabled protections against serious COVID-19 outcomes, which are particularly important for patients with cancer. The American Society of Clinical Oncology Registry enabled the study of COVID-19 vaccine uptake in patients with cancer who were positive for severe acute respiratory syndrome-coronavirus 2. METHODS: Medical oncology practices entered data on patients who were in cancer treatment. The cohort included patients who had severe acute respiratory syndrome-coronavirus 2 infection in 2020 and had visits and vaccine data after December 31, 2020. The primary end point was the time to first vaccination from January 1, 2021. Cumulative incidence estimates and Cox regression with death as a competing risk were used to describe the time to vaccine uptake and factors associated with vaccine receipt. RESULTS: The cohort included 1155 patients from 56 practices. Among 690 patients who received the first vaccine dose, 92% received the second dose. The median time to vaccine was 99 days. After adjustment, older patients were associated with a higher likelihood of vaccination compared with patients younger than 50 years in January through March 2021, and age exhibited a linear effect, with older patients showing higher rates of vaccination. Metastatic solid tumors (hazard ratio [HR], 0.85; 95% confidence interval [CI], 0.73-0.98) or non-B-cell hematologic malignancies (HR, 0.71; 95% CI, 0.54-0.93) compared with nonmetastatic solid tumors, and any comorbidity (HR, 0.83; 95% CI, 0.73-0.95) compared with no comorbidity, were associated with lower vaccination rates. Area-level social determinants of health (lower education attainment and higher unemployment rates) were associated with lower vaccination rates. CONCLUSIONS: Patient age, cancer type, comorbidity, area-level education attainment, and unemployment rates were associated with differential vaccine uptake rates. These findings should inform strategies to communicate about vaccine safety and efficacy to patients with cancer.


Asunto(s)
COVID-19 , Neoplasias , Humanos , Vacunas contra la COVID-19 , SARS-CoV-2 , COVID-19/epidemiología , COVID-19/prevención & control , Vacunación , Neoplasias/epidemiología , Oncología Médica , Sistema de Registros
4.
Ann Surg ; 278(5): e1096-e1102, 2023 11 01.
Artículo en Inglés | MEDLINE | ID: mdl-37232937

RESUMEN

OBJECTIVE: To compare long-term quality of life (QOL) outcomes in breast cancer survivors who received breast-conserving surgery with radiotherapy (BCS+RT) with those who received a mastectomy and reconstructive surgery (Mast+Recon) without radiotherapy and identify other important factors. BACKGROUND: The long-term differences in patient-reported QOL outcomes following BCS+RT and Mast+Recon are not well understood. METHODS: We identified patients from the Texas Cancer Registry with stage 0-II breast cancer diagnosed in 2009-2014 after BCS+RT or Mast+Recon without radiotherapy. Sampling was stratified by age and race and ethnicity. A paper survey was sent to 4800 patients which included validated BREAST-Q and PROMIS modules. Multivariable linear regression models were implemented for each outcome. Minimal clinically important difference for BREAST-Q and PROMIS modules, respectively, was 4 points and 2 points. RESULTS: Of 1215 respondents (25.3% response rate), 631 received BCS+RT and 584 received Mast+Recon. The median interval from diagnosis to survey completion was 9 years. In adjusted analysis, Mast+Recon was associated with worse BREAST-Q psychosocial well-being (effect size: -3.80, P =0.04) and sexual well-being (effect size: -5.41, P =0.02), but better PROMIS physical function (effect size: 0.54, P =0.03) and similar BREAST-Q satisfaction with breasts, physical well-being, and PROMIS upper extremity function ( P >0.05) compared with BCS+RT. Only the difference in sexual well-being reached clinical significance. Older (≥65) patients receiving BCS+RT and younger (<50) patients receiving autologous Mast+Recon typically reported higher QOL scores. Receipt of chemotherapy was associated with detriments to multiple QOL domains. CONCLUSIONS: Patients who underwent Mast+Recon reported worse long-term sexual well-being compared with BCS+RT. Older patients derived a greater benefit from BCS+RT, while younger patients derived a greater benefit from Mast+Recon. These data inform preference-sensitive decision-making for women with early-stage breast cancer.


Asunto(s)
Neoplasias de la Mama , Mastectomía , Femenino , Humanos , Mastectomía Segmentaria , Neoplasias de la Mama/radioterapia , Neoplasias de la Mama/cirugía , Neoplasias de la Mama/psicología , Calidad de Vida , Radioterapia Adyuvante , Medición de Resultados Informados por el Paciente
5.
Cancer Causes Control ; 34(8): 635-645, 2023 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-37160832

RESUMEN

PURPOSE: This study aimed to describe the clinical characteristics and wellness programming preferences of cancer survivors from Acres Homes, a historically Black neighborhood in Houston, Texas, with areas of persistent poverty. The goal of this study was to identify opportunities to increase cancer survivor utilization of healthy eating and active living interventions aligned to cancer center community outreach and engagement efforts. METHODS: This multiple methods study included a retrospective review of electronic health record data (n = 413) and qualitative interviews with cancer survivors (n = 31) immediately preceding initiation of healthy eating, active living programming in Acres Homes. RESULTS: This study found Acres Homes survivors have high rates of co-occurrent cardiometabolic disease including obesity (45.0%), diabetes (30.8%), and other related risk factors as well as treatment-related symptoms. Four major concepts emerged from interviews: (1) Factors that influence survivors' ability to eat well and exercise, (2) Current usage of community resources, (3) Interest in relevant programming, and (4) Specific programming preferences. Opportunities for current and future health promotion programming for cancer survivors were explored. CONCLUSION: Strategically tailoring community resources for cancer survivors can provide a more robust network of support to promote healthy eating and active living in this population. This work informed community implementation of evidence-based health interventions in Acres Homes and may support future projects aiming to enhance community-led cancer prevention efforts in historically underserved communities.


Asunto(s)
Supervivientes de Cáncer , Neoplasias , Humanos , Poblaciones Vulnerables , Ejercicio Físico , Sobrevivientes , Estilo de Vida Saludable , Neoplasias/epidemiología
6.
Cancer ; 127(22): 4142-4150, 2021 11 15.
Artículo en Inglés | MEDLINE | ID: mdl-34342892

RESUMEN

BACKGROUND: Previous studies have examined the association of statin therapy and breast cancer outcomes with mixed results. The objective of this study was to investigate the clinical effects of incident statin use among individuals with triple-negative breast cancer (TNBC). METHODS: Data from the Surveillance, Epidemiology, and End Results-Medicare and Texas Cancer Registry-Medicare databases were used, and women aged ≥66 years who had stage I, II, and III breast cancer were identified. Multivariable Cox proportional hazards regression models were used to examine the association of new statin use in the 12 months after a breast cancer diagnosis with overall survival (OS) and breast cancer-specific survival (BCSS). RESULTS: When examining incident statin use, defined as the initiation of statin therapy in the 12 months after breast cancer diagnosis, a significant association was observed between statin use and improved BCSS (standardized hazard ratio, 0.42; 95% confidence interval [CI], 0.20-0.88; P = .022) and OS (hazard ratio, 0.70; 95% CI, 0.50-0.99; P = .046) among patients with TNBC (n = 1534). No association was observed with BCSS (standardized hazard ratio, 0.99; 95% CI, 0.71-1.39; P = .97) or OS (hazard ratio, 1.04; 95% CI, 0.92-1.17; P = .55) among those without TNBC (n = 15,979). The results were consistent when examining statin exposure as a time-varying variable. CONCLUSIONS: Among women with I, II, and III TNBC, initiation of statin therapy in the 12 months after breast cancer diagnosis was associated with an OS and BCSS benefit. Statins may have a role in select patients with breast cancer, and further investigation is warranted.


Asunto(s)
Neoplasias de la Mama , Inhibidores de Hidroximetilglutaril-CoA Reductasas , Neoplasias de la Mama Triple Negativas , Anciano , Neoplasias de la Mama/tratamiento farmacológico , Neoplasias de la Mama/epidemiología , Bases de Datos Factuales , Femenino , Humanos , Inhibidores de Hidroximetilglutaril-CoA Reductasas/uso terapéutico , Medicare , Modelos de Riesgos Proporcionales , Neoplasias de la Mama Triple Negativas/diagnóstico , Neoplasias de la Mama Triple Negativas/tratamiento farmacológico , Neoplasias de la Mama Triple Negativas/epidemiología , Estados Unidos/epidemiología
7.
Ann Surg Oncol ; 28(7): 3703-3713, 2021 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-33225394

RESUMEN

BACKGROUND: The SSO-ASTRO consensus guideline on invasive breast cancer defined negative margin as no ink on tumor, obviating the need for reexcision in some patients. We evaluated the impact of these recommendations on the rates of reexcision in older breast cancer patients undergoing breast-conserving surgery (BCS). PATIENTS AND METHODS: Women age ≥ 66 years with stage I-II breast cancer who underwent BCS and radiation were identified in the SEER-Medicare linked database (2012-2015). We divided patients into three cohorts: pre-guideline (January 2012 to September 2013), peri-guideline (October 2013 to March 2014), and post-guideline (April 2014 to September 2016). Descriptive statistics were used, and the relative change in reexcision rate between the pre- and post-guideline periods was calculated. Multivariable logistic regression was used to evaluate factors associated with risk of reexcision. RESULTS: A total of 11,639 patients were included (pre-guideline, N = 5211; peri-guideline, N = 1366; post-guideline, N = 5062); overall, 21.7% of patients underwent reexcision. The reexcision rates decreased after the guideline was published (23.5% vs. 19.3%, p < 0.001). In the multivariable model, BCS during the post-guideline period was associated with a statistically significant decreased risk of reexcision (RR = 0.84; 95% CI 0.78-0.90). Lobular histology was associated with a higher risk of reexcision (RR = 1.32; 95% CI 1.19-1.46), and greater surgeon volume was associated with lower risk of reexcision (RR = 0.92; 95% CI 0.85-1.0). CONCLUSIONS: Among older breast cancer patients undergoing BCS for invasive cancer, reexcision rates decreased with the dissemination of the SSO-ASTRO consensus guideline. Identifying factors associated with higher rates of reexcision could improve guideline compliance and reduce the frequency of unnecessary interventions in older patients.


Asunto(s)
Neoplasias de la Mama , Anciano , Neoplasias de la Mama/cirugía , Femenino , Humanos , Márgenes de Escisión , Mastectomía Segmentaria , Medicare , Reoperación , Estados Unidos
8.
Lung ; 199(3): 307-310, 2021 06.
Artículo en Inglés | MEDLINE | ID: mdl-33779802

RESUMEN

PURPOSE: Pulmonary function testing (PFT) in patients with tracheostomies has been perceived as difficult to perform and clinically unreliable. We studied the feasibility, quality, repeatability and clinical significance of PFT. METHODS: Patients with tracheostomies that underwent PFT from January 1, 2010 to February 29, 2012 were identified. Clinical history and PFT data were reviewed retrospectively. RESULTS: Fifty patients (88% men) were identified. Forty-seven (94%) patients were able to perform PFT. Acceptable repeatability was obtained for FVC in 39 (83%) and for FEV1 in 41 (87%). Patients with tracheostomies showed difficulty in meeting ATS end-of-test criteria; only 9 (19%) met plateau criteria and 25 (53%) had exhalation times of greater than 6 s. Obstructive pattern was observed in 30 (64%) and restrictive pattern in 9 (19%). DLCO measurements were attempted in 43 patients and satisfactorily obtained in 34 (79%). CONCLUSIONS: PFT can be performed with reliability in patients with tracheostomies, and they are useful for detecting and classifying types of lung dysfunction.


Asunto(s)
Volumen Espiratorio Forzado/fisiología , Pulmón/fisiopatología , Pruebas de Función Respiratoria/métodos , Insuficiencia Respiratoria/terapia , Traqueostomía , Capacidad Vital/fisiología , Adulto , Anciano , Anciano de 80 o más Años , Estudios de Factibilidad , Femenino , Humanos , Masculino , Persona de Mediana Edad , Insuficiencia Respiratoria/fisiopatología , Estudios Retrospectivos
9.
Cancer ; 126(17): 3929-3938, 2020 09 01.
Artículo en Inglés | MEDLINE | ID: mdl-32573777

RESUMEN

BACKGROUND: Bisphosphonates and denosumab, as adjuvant therapy in breast cancer, have been associated in some studies with improved cancer outcomes. The potential benefits of these drugs used at the lower doses commonly given for osteoporosis have not been established. The objective of this study was to investigate the association between therapy with bone-modifying agents (BMAs) and survival in older women with early breast cancer. METHODS: The authors conducted a retrospective cohort study of women aged ≥66 years with breast cancer who were included in the Surveillance, Epidemiology, and End Results and Texas Cancer Registry Medicare-linked databases. Associations were examined between the receipt of BMAs at dosages indicated for osteoporosis within 2 years after diagnosis and overall and breast cancer-specific survival. Cox proportional hazards models and propensity score adjustment and matching were used for the analyses. RESULTS: Of the 37,724 women included, 7925 (21%) received at least 6 months of a BMA within the first 2 years of breast cancer diagnosis, including bisphosphonates only in 6898 women (80.7%), denosumab only in 1204 (15.2%), and both classes of BMAs in 323 (4.1%). The median follow-up was 64 months. The receipt of a bisphosphonate was associated with improved overall survival (hazard ratio [HR], 0.87; 95% CI, 0.82-0.93) and breast cancer-specific survival (HR, 0.77; 95% CI, 0.64-0.92) after multivariable adjustment. Benefits were primarily seen for patients who had stage II and III disease. No benefits were observed with denosumab (stage II: HR, 1.05 [95% CI, 0.90-1.22]; stage III: HR, 1.09 [95% CI, 0.66-1.82]). CONCLUSIONS: Bisphosphonates at the doses recommended for osteoporosis are associated with improved survival in older postmenopausal women with early breast cancer.


Asunto(s)
Neoplasias de la Mama/tratamiento farmacológico , Denosumab/administración & dosificación , Difosfonatos/administración & dosificación , Osteoporosis/tratamiento farmacológico , Anciano , Anciano de 80 o más Años , Protocolos de Quimioterapia Combinada Antineoplásica/administración & dosificación , Conservadores de la Densidad Ósea/administración & dosificación , Conservadores de la Densidad Ósea/efectos adversos , Neoplasias de la Mama/complicaciones , Neoplasias de la Mama/epidemiología , Neoplasias de la Mama/patología , Relación Dosis-Respuesta a Droga , Femenino , Humanos , Medicare , Estadificación de Neoplasias , Osteoporosis/complicaciones , Osteoporosis/epidemiología , Osteoporosis/patología , Supervivencia sin Progresión , Modelos de Riesgos Proporcionales , Texas/epidemiología , Resultado del Tratamiento , Estados Unidos/epidemiología
10.
Oncologist ; 25(9): 749-757, 2020 09.
Artículo en Inglés | MEDLINE | ID: mdl-32431013

RESUMEN

BACKGROUND: Delays in the initiation of therapy among patients with early stage breast cancer (BC) can negatively affect outcomes. Patients treated with neoadjuvant systemic chemotherapy (NSC) usually display tumors with high-risk features. Considering these high-risk characteristics and the evidence supporting adverse outcomes associated with delays in adjuvant chemotherapy initiation, we sought to determine whether a delay in NSC initiation is associated with overall survival (OS). METHODS: We identified patients diagnosed between January 1995 and December 2015 with invasive primary BC (stage I-III) who received NSC at MD Anderson Cancer Center. Patients were categorized according to their time from BC diagnosis to NSC (in days) into three subgroups: 0-30, 31-60, and ≥61 days. Primary endpoint was OS. Descriptive statistics and Cox's proportional hazard models were used. RESULTS: A total of 5,137 patients were included. Median follow-up was 6.5 years. The 5-year OS estimates according to time to NSC were 87%, 85%, and 83% in patients who received NSC within 0-30, 31-60, and ≥61 days after diagnosis, respectively (p = .006). In multivariable analysis, compared with time to NSC of 0-30 days, delayed NSC ≥61 days was associated with an increased risk of death (31-60 days: hazard ratio [HR] = 1.05 [95% confidence interval (CI) 0.92-1.19]; ≥61 days, HR = 1.28 [95% CI 1.06-1.54]). In stratified analyses, the association between delay in NSC initiation and increased risk of death was statistically significant for patients with stage I and II BC (31-60 days: HR = 1.22 [95% CI 1.02-1.47]; ≥61 days, HR = 1.41 [95% CI 1.07-1.86]) and among patients with HER2-positive tumors ( ≥61 days, HR = 1.86 [95% CI 1.21-2.86]). CONCLUSION: A delay in NSC initiation of more than 61 days after BC diagnosis was associated with an increased risk of death. Early initiation of NSC should be a priority; multidisciplinary teams must focus on coordination of care and patient-centered, timely treatment planning and delivery. IMPLICATIONS FOR PRACTICE: The results of this study showed that a delay in neoadjuvant systemic chemotherapy initiation of more than 61 days after breast cancer diagnosis is associated with an increased risk of death; therefore, efforts must focus on early initiation of therapy, which should be a priority. Multidisciplinary teams must enhance coordination of care and patient-centered, timely treatment planning and delivery.


Asunto(s)
Neoplasias de la Mama , Terapia Neoadyuvante , Neoplasias de la Mama/tratamiento farmacológico , Quimioterapia Adyuvante , Femenino , Humanos , Modelos de Riesgos Proporcionales
11.
Ann Surg Oncol ; 27(4): 1013-1022, 2020 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-31916092

RESUMEN

BACKGROUND: The effect of surgeon factors on patient-reported quality-of-life outcomes after breast-conserving therapy (BCT) is unknown and may help patients make informed care decisions. METHODS: We performed a survey study of women aged ≥ 67 years with non-metastatic breast cancer diagnosed in 2009 and treated with guideline-concordant BCT, to determine the association of surgeon factors with patient-reported outcomes. The treating surgeon was identified using Medicare claims, and surgeon factors were identified via the American Medical Association Physician Masterfile. The primary outcome was patient-reported cosmetic satisfaction measured by the Cancer Surveillance and Outcomes Research Team (CanSORT) Satisfaction with Breast Cosmetic Outcome instrument, while secondary outcomes included BREAST-Q subdomains. All patient, treatment, and surgeon covariables were included in a saturated multivariable linear regression model with backward elimination applied until remaining variables were p < 0.1. RESULTS: Of 1650 women randomly selected to receive the questionnaire, 489 responded, of whom 289 underwent BCT. Median age at diagnosis was 72 years and the time from diagnosis to survey was 6 years. The mean adjusted CanSORT score was higher for patients treated by surgical oncologists than patients treated by non-surgical oncologists (4.01 [95% confidence interval [CI] 3.65-4.38] vs. 3.53 [95% CI 3.28-3.77], p = 0.006). Similarly, mean adjusted BREAST-Q Physical Well-Being (91.97 [95% CI 86.13-97.80] vs. 83.04 [95% CI 80.85-85.22], p = 0.006) and Adverse Radiation Effects (95.28 [95% CI 91.25-99.31] vs. 88.90 [95% CI 86.23-91.57], p = 0.004) scores were better among patients treated by surgical oncologists. CONCLUSIONS: Specialized surgical oncology training is associated with improved long-term patient-reported outcomes. These findings underscore the value of specialized training and may be useful to patients choosing their care team.


Asunto(s)
Neoplasias de la Mama/psicología , Neoplasias de la Mama/terapia , Supervivientes de Cáncer/psicología , Medición de Resultados Informados por el Paciente , Calidad de Vida , Anciano , Anciano de 80 o más Años , Braquiterapia/psicología , Terapia Combinada/psicología , Femenino , Humanos , Modelos Lineales , Mastectomía/psicología , Mastectomía Segmentaria/psicología , Medicare , Análisis Multivariante , Tratamientos Conservadores del Órgano , Satisfacción del Paciente , Radioterapia , Oncología Quirúrgica/educación , Encuestas y Cuestionarios , Estados Unidos
12.
Cancer ; 124(14): 3000-3007, 2018 07 15.
Artículo en Inglés | MEDLINE | ID: mdl-29689595

RESUMEN

BACKGROUND: The objective of this study was to determine patient characteristics associated with potentially inappropriate medication (PIM) use and its impact on outcomes for patients with breast or colorectal cancer receiving adjuvant chemotherapy. METHODS: The Surveillance, Epidemiology, and End Results database, linked to Medicare claims, was used. The cohort included patients who were 66 years old or older and were diagnosed with stage II or III breast or colorectal cancer between July 1, 2007, and December 31, 2009. The Drugs to Avoid in the Elderly (DAE) list and the Beers criteria were used to identify PIM use. Univariate/multivariate logistic regression determined the association of baseline PIMs with covariates. Event-free survival (EFS) was defined as the time from chemotherapy initiation to the first emergency room (ER) visit, hospitalization, death, or a composite until 3 months after chemotherapy. Cox proportional hazards modeling determined the association of PIMs with EFS. RESULTS: The analysis included 1595 patients with breast cancer and 1528 patients with colorectal cancer. The baseline PIM frequencies were 22.2% (according to the DAE list) and 27.6% (according to the Beers criteria) in the breast cohort and 15.5% (according to the DAE list) and 24.8% (according to the Beers criteria) in the colorectal cohort. Among patients with breast cancer, 37.5% had at least 1 adverse outcome; associations included the use of ≥5 medications, an advanced stage, higher comorbidity, and prior ER visits/hospitalizations. Baseline PIM use according to the DAE list was associated with an increased risk of death in patients with breast cancer. Among patients with colorectal cancer, 45% had at least 1 adverse outcome, and associations included the use of ≥5 medications, older age, female sex, and higher comorbidity. A time-to-event analysis revealed no association between baseline PIM use and most outcomes. CONCLUSIONS: These findings require further prospective confirmation, but they support a correlation between polypharmacy and adverse outcomes for cancer patients and call into question the association with PIMs. Cancer 2018;124:3000-7. © 2018 American Cancer Society.


Asunto(s)
Antineoplásicos/efectos adversos , Neoplasias de la Mama/terapia , Neoplasias Colorrectales/terapia , Prescripción Inadecuada/estadística & datos numéricos , Lista de Medicamentos Potencialmente Inapropiados , Factores de Edad , Anciano , Anciano de 80 o más Años , Antineoplásicos/administración & dosificación , Neoplasias de la Mama/mortalidad , Neoplasias de la Mama/patología , Quimioterapia Adyuvante/métodos , Quimioterapia Adyuvante/estadística & datos numéricos , Neoplasias Colorrectales/mortalidad , Neoplasias Colorrectales/patología , Comorbilidad , Estudios Transversales , Supervivencia sin Enfermedad , Femenino , Estudios de Seguimiento , Humanos , Masculino , Medicare/estadística & datos numéricos , Estadificación de Neoplasias , Polifarmacia , Estudios Retrospectivos , Factores de Riesgo , Programa de VERF/estadística & datos numéricos , Factores Sexuales , Estados Unidos
13.
Ann Diagn Pathol ; 35: 69-76, 2018 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-29843069

RESUMEN

PURPOSE: To evaluate the incidence of cMET proto-oncogene aberration in a cohort of triple negative breast cancers using immunohistochemistry and fluorescence in situ hybridization (FISH) methods and correlated with patient outcome. PATIENTS AND METHODS: One hundred and six female patients with diagnosis of triple negative invasive breast carcinoma at The University of Texas-M D Anderson Cancer Center from 1983 to 2009 were included in the study. Expression of cMET was assessed by IHC using rabbit monoclonal anti-total cMET antibody (SP44 from Ventana). Staining intensity was scored on a scale of 0, 1+, 2+ and 3+. cMET overexpression was defined as at least moderate membranous/cytoplasmic staining in ≥50% of tumor cells (score ≥ 2+). FISH analysis was performed using MET (7q31) specific probe (BAC clone RP11-95i20, Abbott Molecular Inc.) and the centromere probe (CEP7/D7Z1, Abbott Molecular Inc.) as internal control. cMET amplification was defined as gene copy numbers ≥4 per cell or cMET/CEP7 ratio ≥ 2. cMET status was tested for correlation using Fisher's exact test with other clinicopathological parameters. The Kaplan-Meier product limit method was used to estimate the survival outcomes. Cox proportional hazards models were fit to determine the association of cMET status by IHC, or by FISH, or by copy number with survival outcomes after adjustment for other patient and disease characteristics. RESULTS: Medium follow up is 69.4 months (range 9-317 months). cMET was successfully evaluated by both IHC and FISH methods in ninety-six patients. There were 13 patients whose tumors overexpressed cMET was by IHC. Two patients had cMET amplification by FISH using definitive of cMET/CEP7 ratio of ≥2 and four patients had cMET copy number >4. Only one patient showed cMET/CEP7 ratio of 2.53 and one was positive for cMET overexpression by IHC. No significant association between cMET overexpression by IHC and by FISH using cut-off of with either cMET/CEP7 ratio of ≥2 or cMET copy number of >4 (P = 1.0). There was no significant correlation between the cMET overexpression and other clinicopathological characteristics, such as patient demographics, tumor grade, stage, or chemotherapy treatment history. cMET overexpression and gene amplification did not correlate with the prognosis of TNBC regarding OS or DFS. CONCLUSION: MET amplification is a rare incidence in TNBCs. cMET overexpression is infrequent in TNBCs and may not be driven by gene amplification. Neither have significant prognostic value nor do they correlate with other clinicopathological characteristics in this TNBC cohort.


Asunto(s)
Carcinoma Ductal de Mama/genética , Amplificación de Genes , Proteínas Proto-Oncogénicas c-met/genética , Neoplasias de la Mama Triple Negativas/genética , Carcinoma Ductal de Mama/metabolismo , Carcinoma Ductal de Mama/patología , Femenino , Regulación Neoplásica de la Expresión Génica , Humanos , Inmunohistoquímica , Hibridación Fluorescente in Situ , Persona de Mediana Edad , Proto-Oncogenes Mas , Neoplasias de la Mama Triple Negativas/metabolismo , Neoplasias de la Mama Triple Negativas/patología
14.
Cancer ; 123(6): 940-947, 2017 05 15.
Artículo en Inglés | MEDLINE | ID: mdl-27780311

RESUMEN

BACKGROUND: The National Surgical Adjuvant Breast and Bowel Project B35 and International Breast Cancer Intervention Studies II Ductal Carcinoma In Situ trials showed similar treatment effects of anastrozole and tamoxifen in reducing cancer recurrence risk among ductal carcinoma in situ (DCIS) patients. Studies have shown low levels of hormone therapy drug initiation for DCIS patients, but the current body of literature lacks information on the 5-year adherence rates for these drugs from population-based studies. METHODS: This study evaluated the initiation and 5-year adherence levels for women aged 66 to 85 years who had been diagnosed with estrogen receptor (ER)-positive DCIS between 2007 and 2011 according to the Surveillance, Epidemiology, and End Results and Texas Cancer Registry databases linked to Medicare claims. Chi-square tests, trend tests, and logistic regression were used to identify factors associated with treatment initiation. RESULTS: There were 2871 women with ER-positive DCIS, and approximately 45% began treatment with tamoxifen or aromatase inhibitors (AIs) within 1 year of their DCIS diagnosis. The median age was 73 years for the users and 75 years for the nonusers. Women aged 66 to 70 years who underwent lumpectomy and radiation therapy were significantly more likely to initiate hormone therapy. The initiation of therapy was also significantly associated with patients' geographic location, education, marital status, diagnosis year, and race/ethnicity. Among users, adherence decreased from 67% in the first year to 30% in the fifth year. CONCLUSIONS: Initiation and adherence levels for tamoxifen or AIs among older women with ER-positive DCIS are low. Future studies should develop methods to ensure that informed discussions take place between health care providers and patients regarding hormonal therapy for cancer prevention. Cancer 2017;123:940-47. © 2016 American Cancer Society.


Asunto(s)
Antineoplásicos Hormonales/uso terapéutico , Inhibidores de la Aromatasa/uso terapéutico , Carcinoma de Mama in situ/tratamiento farmacológico , Carcinoma de Mama in situ/epidemiología , Carcinoma Ductal de Mama/tratamiento farmacológico , Carcinoma Ductal de Mama/epidemiología , Cumplimiento de la Medicación , Tamoxifeno/uso terapéutico , Anciano , Anciano de 80 o más Años , Biomarcadores de Tumor , Carcinoma de Mama in situ/diagnóstico , Carcinoma Ductal de Mama/diagnóstico , Terapia Combinada , Comorbilidad , Femenino , Humanos , Clasificación del Tumor , Estadificación de Neoplasias , Programa de VERF , Factores Socioeconómicos , Texas/epidemiología , Carga Tumoral
15.
Am J Respir Crit Care Med ; 193(1): 68-77, 2016 Jan 01.
Artículo en Inglés | MEDLINE | ID: mdl-26367186

RESUMEN

RATIONALE: Advanced bronchoscopy techniques such as electromagnetic navigation (EMN) have been studied in clinical trials, but there are no randomized studies comparing EMN with standard bronchoscopy. OBJECTIVES: To measure and identify the determinants of diagnostic yield for bronchoscopy in patients with peripheral lung lesions. Secondary outcomes included diagnostic yield of different sampling techniques, complications, and practice pattern variations. METHODS: We used the AQuIRE (ACCP Quality Improvement Registry, Evaluation, and Education) registry to conduct a multicenter study of consecutive patients who underwent transbronchial biopsy (TBBx) for evaluation of peripheral lesions. MEASUREMENTS AND MAIN RESULTS: Fifteen centers with 22 physicians enrolled 581 patients. Of the 581 patients, 312 (53.7%) had a diagnostic bronchoscopy. Unadjusted for other factors, the diagnostic yield was 63.7% when no radial endobronchial ultrasound (r-EBUS) and no EMN were used, 57.0% with r-EBUS alone, 38.5% with EMN alone, and 47.1% with EMN combined with r-EBUS. In multivariate analysis, peripheral transbronchial needle aspiration (TBNA), larger lesion size, nonupper lobe location, and tobacco use were associated with increased diagnostic yield, whereas EMN was associated with lower diagnostic yield. Peripheral TBNA was used in 16.4% of cases. TBNA was diagnostic, whereas TBBx was nondiagnostic in 9.5% of cases in which both were performed. Complications occurred in 13 (2.2%) patients, and pneumothorax occurred in 10 (1.7%) patients. There were significant differences between centers and physicians in terms of case selection, sampling methods, and anesthesia. Medical center diagnostic yields ranged from 33 to 73% (P = 0.16). CONCLUSIONS: Peripheral TBNA improved diagnostic yield for peripheral lesions but was underused. The diagnostic yields of EMN and r-EBUS were lower than expected, even after adjustment.


Asunto(s)
Broncoscopía/estadística & datos numéricos , Enfermedades Pulmonares/diagnóstico , Anciano , Biopsia con Aguja Fina/estadística & datos numéricos , Lavado Broncoalveolar/estadística & datos numéricos , Broncoscopía/efectos adversos , Broncoscopía/métodos , Femenino , Humanos , Pulmón/patología , Enfermedades Pulmonares/patología , Neoplasias Pulmonares/diagnóstico , Neoplasias Pulmonares/patología , Masculino , Neumotórax/etiología , Pautas de la Práctica en Medicina/estadística & datos numéricos , Sistema de Registros/estadística & datos numéricos , Sensibilidad y Especificidad , Resultado del Tratamiento
16.
Cancer ; 122(18): 2886-94, 2016 09 15.
Artículo en Inglés | MEDLINE | ID: mdl-27305037

RESUMEN

BACKGROUND: The authors compared longitudinal patient-reported outcomes and physician-rated cosmesis with conventionally fractionated whole-breast irradiation (CF-WBI) versus hypofractionated whole-breast irradiation (HF-WBI) within the context of a randomized trial. METHODS: From 2011 to 2014, a total of 287 women with American Joint Committee on Cancer stage 0 to stage II breast cancer were randomized to receive CF-WBI (at a dose of 50 grays in 25 fractions plus a tumor bed boost) or HF-WBI (at a dose of 42.56 grays in 16 fractions plus a tumor bed boost) after breast-conserving surgery. Patient-reported outcomes were assessed using the Breast Cancer Treatment Outcome Scale (BCTOS), the Functional Assessment of Cancer Therapy-Breast, and the Body Image Scale and were recorded at baseline and 0.5, 1, 2, and 3 years after radiotherapy. Physician-rated cosmesis was assessed at the same time points. Outcomes by treatment arm were compared at each time point using a 2-sided Student t test. Multivariable mixed effects growth curve models assessed the effects of treatment arm and time on longitudinal outcomes. RESULTS: Of the 287 patients enrolled, 149 were randomized to CF-WBI and 138 were randomized to HF-WBI. At 2 years, the Functional Assessment of Cancer Therapy-Breast Trial Outcome Index score was found to be modestly better in the HF-WBI arm (mean 79.6 vs 75.9 for CF-WBI; P = .02). In multivariable mixed effects models, treatment arm was not found to be associated with longitudinal outcomes after adjusting for time and baseline outcome measures (P≥.14). The linear effect of time was significant for BCTOS measures of functional status (P = .001, improved with time) and breast pain (P = .002, improved with time). CONCLUSIONS: In this randomized trial, longitudinal outcomes did not appear to differ by treatment arm. Patient-reported functional and pain outcomes improved over time. These findings are relevant when counseling patients regarding decisions concerning radiotherapy. Cancer 2016. © 2016 American Cancer Society. Cancer 2016;122:2886-2894. © 2016 American Cancer Society.


Asunto(s)
Neoplasias de la Mama/radioterapia , Adulto , Anciano , Anciano de 80 o más Años , Fraccionamiento de la Dosis de Radiación , Femenino , Humanos , Estudios Longitudinales , Persona de Mediana Edad , Medición de Resultados Informados por el Paciente , Radioterapia Adyuvante
17.
Breast Cancer Res Treat ; 157(2): 339-350, 2016 06.
Artículo en Inglés | MEDLINE | ID: mdl-27146586

RESUMEN

Chemotherapy for early-stage breast cancer has lowered cancer recurrence and deaths. However, short-term mortality rates due to cancer or treatment in the general population remain largely unknown. In this study, we evaluate the short-term mortality rate and the determinants of such outcome among a cohort of older breast cancer patients treated with adjuvant chemotherapy. This is a population-based study based on the Surveillance, Epidemiology, and End Results Program (SEER)-Medicare and the Texas Cancer Registry (TCR)-Medicare databases. Patients diagnosed with early-stage breast cancer between 2003 and 2011 who were 66 years or older and were treated with adjuvant chemotherapy within 6 months of diagnosis were included. Short-term mortality was defined as death from any cause within one year of breast cancer diagnosis. Descriptive statistics and multivariable logistic regression modeling were used for the analysis. Of the 21,536 patients included, a total of 625 (2.9 %) died within one year of breast cancer diagnosis. In multivariate analysis, older age (using 66-70 as reference category; 71-75 years OR 1.31, 95 % CI 1.05-1.62; 76-80 years OR 1.73, 95 % CI 1.36-2.19; >80 years OR 3.48, 95 % CI 2.7-4.48) and higher comorbidity index (using Charlson score of 0 as a reference, those with score of 1 or >2 had higher risk OR 1.46, 95 % CI 1.19-1.8 and OR 2.98, 95 % CI 2.42-3.67, respectively) were associated with the increased risk of short-term mortality. Other factors significantly associated with the outcome were higher grade and stage, ER-negative status, poor census tract area, and mastectomy. The findings of this study revealed that, in this large cohort of older breast cancer patients treated with adjuvant chemotherapy, 2.9 % of the population died within one year of breast cancer diagnosis. Finally, it was concluded that tumor- and patient-related characteristics were associated with short-term death. Our findings add relevant information that can be used by clinicians when balancing the risk.


Asunto(s)
Neoplasias de la Mama/tratamiento farmacológico , Neoplasias de la Mama/mortalidad , Quimioterapia Adyuvante/métodos , Distribución por Edad , Anciano , Anciano de 80 o más Años , Neoplasias de la Mama/patología , Femenino , Humanos , Modelos Logísticos , Estadificación de Neoplasias , Programa de VERF , Análisis de Supervivencia , Resultado del Tratamiento
18.
Ann Surg Oncol ; 23(5): 1515-21, 2016 May.
Artículo en Inglés | MEDLINE | ID: mdl-26678405

RESUMEN

BACKGROUND: No studies have examined the impact of the interval from conclusion of neoadjuvant chemotherapy to surgery in breast cancer patients. This study was undertaken to investigate the relationship between time interval from neoadjuvant chemotherapy to surgery and survival outcomes. METHODS: Breast cancer patients diagnosed with stage I-III disease who received neoadjuvant chemotherapy June 1995 to April 2007 were identified. The effect of neoadjuvant chemotherapy to surgery interval, defined as ≤4, 4-6, or >6 weeks, on survival outcomes was examined. Descriptive statistics and Cox proportional hazards models were used. RESULTS: A total of 1101 patients were identified. Median time to surgery was 33 (range 8-159) days; 335 patients (30.4 %) had surgery within 4 weeks of their last dose of neoadjuvant chemotherapy, 524 (47.6 %) within 4-6 weeks, and 242 (22.0 %) after more than 6 weeks. Median follow-up was 94 (range 3-178) months. The 5-year overall survival (OS) estimates were 79, 87, and 81 % in patients who underwent surgery ≤4, 4-6, and >6 weeks after neoadjuvant chemotherapy, respectively (p = 0.03). The three groups did not differ in 5-year recurrence-free survival (RFS) or locoregional recurrence-free survival (LRFS). In multivariable analysis, compared with an interval of ≤4 weeks, patients who underwent surgery at 4-6 or >6 weeks had equivalent OS, LRFS, and RFS; a sensitivity analysis suggested worse OS in patients who underwent surgery at >8 weeks. CONCLUSIONS: Patients with neoadjuvant chemotherapy to surgery intervals of up to 8 weeks had equivalent OS, RFS, and LRFS.


Asunto(s)
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Neoplasias de la Mama/mortalidad , Carcinoma Ductal de Mama/mortalidad , Mastectomía/mortalidad , Terapia Neoadyuvante/mortalidad , Recurrencia Local de Neoplasia/mortalidad , Neoplasias de la Mama Triple Negativas/mortalidad , Neoplasias de la Mama/tratamiento farmacológico , Neoplasias de la Mama/patología , Neoplasias de la Mama/cirugía , Carcinoma Ductal de Mama/tratamiento farmacológico , Carcinoma Ductal de Mama/patología , Carcinoma Ductal de Mama/cirugía , Quimioterapia Adyuvante , Terapia Combinada , Femenino , Estudios de Seguimiento , Humanos , Persona de Mediana Edad , Invasividad Neoplásica , Recurrencia Local de Neoplasia/tratamiento farmacológico , Recurrencia Local de Neoplasia/patología , Recurrencia Local de Neoplasia/cirugía , Estadificación de Neoplasias , Pronóstico , Modelos de Riesgos Proporcionales , Estudios Prospectivos , Estudios Retrospectivos , Tasa de Supervivencia , Tiempo de Tratamiento , Neoplasias de la Mama Triple Negativas/tratamiento farmacológico , Neoplasias de la Mama Triple Negativas/patología , Neoplasias de la Mama Triple Negativas/cirugía
19.
Breast Cancer Res Treat ; 153(2): 417-23, 2015 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-26272743

RESUMEN

Patients who achieve a pathological complete response (pCR) after neoadjuvant therapy, including chemotherapy with or without trastuzumab (NAT) have better outcomes than patients with residual disease. Despite the excellent prognosis associated with achieving a pCR, tumors still recur. The objective of this study was to evaluate factors associated with tumor recurrence and survival among patients achieving pCR after NAT. We identified 749 patients with primary breast cancer who achieved pCR after NAT between 1988 and 2009. pCR was defined as no evidence of invasive cancer in the breast and ipsilateral axillary lymph nodes on pathological evaluation. The Kaplan-Meier product limit method and multivariate Cox proportional hazards models were used to determine the association between clinical and demographic factors and outcomes. Median follow-up was 35 months (range, 1-258 months). Overall 5-year distant metastasis-free survival was 93% (95% confidence interval [CI], 90-95%) and 5-year overall survival (OS) was 96% (95% CI, 93-97%). In the multivariable model, we observed that patients >50 years had significantly decreased risk of distant metastasis (hazard ratio [HR] 0.47; 95% CI, 0.22-0.98) and that patients with clinical stage at diagnosis IIIB-C cancer had both an increased risk of distant metastasis (HR 3.92; 95% CI, 1.54-10.00) and lower OS (HR 4.75; 95% CI, 1.60-14.08). Patients with pCR after NAT have excellent outcomes. However, our data show that younger patient and those with clinical stage at diagnosis IIIB and IIIC cancers are at increased risk of developing distant metastasis.


Asunto(s)
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Neoplasias de la Mama/tratamiento farmacológico , Neoplasias de la Mama/mortalidad , Adulto , Anciano , Anciano de 80 o más Años , Biomarcadores de Tumor , Neoplasias de la Mama/patología , Terapia Combinada , Femenino , Humanos , Estimación de Kaplan-Meier , Persona de Mediana Edad , Terapia Neoadyuvante , Clasificación del Tumor , Metástasis de la Neoplasia , Recurrencia Local de Neoplasia , Estadificación de Neoplasias , Modelos de Riesgos Proporcionales , Inducción de Remisión , Resultado del Tratamiento , Adulto Joven
20.
Oncologist ; 19(11): 1200-6, 2014 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-25273079

RESUMEN

BACKGROUND: Sleep disturbance is a prominent complaint of cancer patients. Most studies have focused on insomnia and cancer-related fatigue. Obstructive sleep apnea (OSA) has been reported in small studies and case reports. METHODS: In a retrospective review of patients who underwent formal sleep evaluation and polysomnography (PSG) from 2006 to 2011, 56 patients with tumors in the head and neck region were identified. Clinical characteristics, sleep-related history, and PSG data were reviewed. RESULTS: Most patients had active cancer (80%), and the majority had squamous pathology (68%). Prominent symptoms included daytime fatigue (93%), daytime sleepiness (89%), and snoring (82%). Comorbid conditions primarily included hypertension (46%) and hypothyroidism (34%). Significant sleep-related breathing disorder was noted in 93% of patients, and 84% met clinical criteria for OSA. A male predominance (77%) was noted, and patients were not obese (body mass index <30 kg/m(2) in 52%). The majority of patients (79%) underwent radiation prior to sleep study, of which 88% had OSA, and in the group without prior radiation, 67% had OSA. Adherence to positive airway pressure (PAP) therapy was slightly better when compared with the general population. A subset of patients with persistent hypoxia despite advanced forms of PAP required tracheostomy. Multivariate analysis revealed that patients with active disease and radiation prior to PSG were more likely to have OSA. CONCLUSION: Sleep-related breathing disorder was common in patients with tumors in the head and neck region referred for evaluation of sleep disruption, and most met clinical criteria for OSA. Daytime fatigue and sleepiness were the most common complaints. OSA was prevalent in male patients, and most with OSA were not obese. Architectural distortion from the malignancy and/or treatment may predispose these patients to OSA by altering anatomic and neural factors. A heightened clinical suspicion for sleep-related breathing disorder and referral to a sleep specialist would be beneficial for patients with these complaints.


Asunto(s)
Neoplasias de Cabeza y Cuello/complicaciones , Apnea Obstructiva del Sueño/etiología , Trastornos del Sueño-Vigilia/etiología , Adulto , Anciano , Anciano de 80 o más Años , Presión de las Vías Aéreas Positiva Contínua , Fatiga/etiología , Femenino , Neoplasias de Cabeza y Cuello/radioterapia , Humanos , Modelos Logísticos , Masculino , Persona de Mediana Edad , Neoplasias de Células Escamosas/complicaciones , Neoplasias de Células Escamosas/radioterapia , Polisomnografía , Estudios Retrospectivos , Apnea Obstructiva del Sueño/terapia , Trastornos del Sueño-Vigilia/terapia
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