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1.
Clin Cancer Res ; 27(11): 3050-3060, 2021 06 01.
Artículo en Inglés | MEDLINE | ID: mdl-33771853

RESUMEN

PURPOSE: As hypoxia can mediate resistance to immunotherapy, we investigated the safety, tolerability, and efficacy of combining evofosfamide, a prodrug that alleviates hypoxia, with ipilimumab, an immune checkpoint inhibitor, in immunologically "cold" cancers, which are intrinsically insensitive to immunotherapy, as well as in "hot/warm" metastatic cancers that are, atypical of such cancers, resistant to immunotherapy. PATIENTS AND METHODS: In a phase I, 3+3 dose-escalation trial (NCT03098160), evofosfamide (400-640 mg/m2) and ipilimumab (3 mg/kg) were administered in four 3-week cycles. The former was administered on days 1 and 8 of cycles 1-2, while the latter was administered on day 8 of cycles 1-4. Response was assessed using immune-related RECIST and retreatment was allowed, if deemed beneficial, after completion of cycle 4 or at progression. RESULTS: Twenty-two patients were enrolled, of whom 21 were evaluable, encompassing castration-resistant prostate cancer (n = 11), pancreatic cancer (n = 7), immunotherapy-resistant melanoma (n = 2), and human papillomavirus-negative head and neck cancer (n = 1). Drug-related hematologic toxicities, rash, fever, nausea, vomiting, and elevation of liver enzymes were observed in > 10% of patients. The most common drug-related grade 3 adverse event was alanine aminotransferase elevation (33.3%). Two patients discontinued ipilimumab and 4 required evofosfamide deescalation due to toxicity. Of 18 patients with measurable disease at baseline, 3 (16.7%) achieved partial response and 12 (66.7%) achieved stable disease. The best responses were observed at 560 mg/m2 evofosfamide. Preexisting immune gene signatures predicted response to therapy, while hypermetabolic tumors predicted progression. Responders also showed improved peripheral T-cell proliferation and increased intratumoral T-cell infiltration into hypoxia. CONCLUSIONS: No new or unexpected safety signals were observed from combining evofosfamide and ipilimumab, and evidence of therapeutic activity was noted.


Asunto(s)
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Neoplasias de Cabeza y Cuello/tratamiento farmacológico , Ipilimumab/administración & dosificación , Melanoma/tratamiento farmacológico , Nitroimidazoles/administración & dosificación , Neoplasias Pancreáticas/tratamiento farmacológico , Mostazas de Fosforamida/administración & dosificación , Neoplasias de la Próstata/tratamiento farmacológico , Carcinoma de Células Escamosas de Cabeza y Cuello/tratamiento farmacológico , Anciano , Femenino , Humanos , Ipilimumab/efectos adversos , Masculino , Dosis Máxima Tolerada , Persona de Mediana Edad , Nitroimidazoles/efectos adversos , Mostazas de Fosforamida/efectos adversos , Seguridad , Resultado del Tratamiento
2.
Medicine (Baltimore) ; 95(28): e4228, 2016 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-27428229

RESUMEN

BACKGROUND: We aimed to study the prevalence of oral sex and its possible association with human papillomavirus (HPV) 16 infection in the development of oropharyngeal cancer in the US population for possible prevention. METHODS: We conduct a systemic review on the prevalence of oral sex among Americans among different age groups, the prevalence of HPV 16 infection reported in oropharyngeal cancer, and correlation between oral sex and oropharyngeal cancer. RESULTS: Oral sex is prevalent among adolescents and sexually active adults. Sixty percent of oropharyngeal cancer reported in the United States is associated with HPV 16 infections. Individuals who practiced oral sex with multiple partners are at risk for developing oropharyngeal cancer and need to be informed about practicing safe sex or getting vaccination. CONCLUSION: Family physicians will play a key role in prevention and educating the public about the risk of oral sex.


Asunto(s)
Papillomavirus Humano 16 , Neoplasias Orofaríngeas/virología , Infecciones por Papillomavirus/virología , Conducta Sexual , Adolescente , Adulto , Femenino , Humanos , Masculino , Neoplasias Orofaríngeas/epidemiología , Infecciones por Papillomavirus/epidemiología , Prevalencia , Factores de Riesgo , Parejas Sexuales , Estados Unidos/epidemiología
3.
J Clin Oncol ; 34(15): 1764-71, 2016 05 20.
Artículo en Inglés | MEDLINE | ID: mdl-27044938

RESUMEN

PURPOSE: The primary objective was to determine safety, toxicity, and a recommended phase II dose regimen of LY2606368, an inhibitor of checkpoint kinase 1, as monotherapy. PATIENTS AND METHODS: This phase I, nonrandomized, open-label, dose-escalation trial used a 3 + 3 dose-escalation scheme and included patients with advanced solid tumors. Intravenous LY2606368 was dose escalated from 10 to 50 mg/m(2) on schedule 1 (days 1 to 3 every 14 days) or from 40 to 130 mg/m(2) on schedule 2 (day 1 every 14 days). Safety measures and pharmacokinetics were assessed, and pharmacodynamics were measured in blood, hair follicles, and circulating tumor cells. RESULTS: Forty-five patients were treated; seven experienced dose-limiting toxicities (all hematologic). The maximum-tolerated doses (MTDs) were 40 mg/m(2) (schedule 1) and 105 mg/m(2) (schedule 2). The most common related grade 3 or 4 treatment-emergent adverse events were neutropenia, leukopenia, anemia, thrombocytopenia, and fatigue. Grade 4 neutropenia occurred in 73.3% of patients and was transient (typically < 5 days). Febrile neutropenia incidence was low (7%). The LY2606368 exposure over the first 72 hours (area under the curve from 0 to 72 hours) at the MTD for each schedule coincided with the exposure in mouse xenografts that resulted in maximal tumor responses. Minor intra- and intercycle accumulation of LY2606368 was observed at the MTDs for both schedules. Two patients (4.4%) had a partial response; one had squamous cell carcinoma (SCC) of the anus and one had SCC of the head and neck. Fifteen patients (33.3%) had a best overall response of stable disease (range, 1.2 to 6.7 months), six of whom had SCC. CONCLUSION: An LY2606368 dose of 105 mg/m(2) once every 14 days is being evaluated as the recommended phase II dose in dose-expansion cohorts for patients with SCC.


Asunto(s)
Quinasa 1 Reguladora del Ciclo Celular (Checkpoint 1)/antagonistas & inhibidores , Neoplasias/tratamiento farmacológico , Inhibidores de Proteínas Quinasas/uso terapéutico , Pirazinas/uso terapéutico , Pirazoles/uso terapéutico , Adulto , Anciano , Anciano de 80 o más Años , Femenino , Humanos , Masculino , Dosis Máxima Tolerada , Persona de Mediana Edad , Pirazinas/farmacocinética , Pirazoles/farmacocinética
4.
Oncotarget ; 6(40): 43127-34, 2015 Dec 15.
Artículo en Inglés | MEDLINE | ID: mdl-26503473

RESUMEN

OBJECTIVE AND METHODS: In this phase 1b study, patients with stage 4 or unresectable stage 3 melanoma were treated with escalating doses of lenvatinib (once daily) and temozolomide (TMZ) (days 1-5) in 28-day cycles, to determine the maximum tolerated dose (MTD) of the combination. Dose Level (DL)1: lenvatinib 20 mg, TMZ 100 mg/m2; DL2: lenvatinib 24 mg, TMZ 100 mg/m2; DL3: lenvatinib 24 mg, TMZ 150 mg/m2. Adverse events (AEs) were recorded and tumor response assessed per RECIST 1.0. RESULTS: Dose-limiting toxicity occurred in 1 of 32 treated patients (DL1); MTD was not reached. The highest dose administered was lenvatinib 24 mg + TMZ 150 mg/m2. Most common treatment-related AEs included fatigue (56.3%), hypertension (53.1%), and proteinuria (46.9%). Overall objective response rate was 18.8% (6 patients), all partial response; (DL1, n = 1; DL3, n = 5). Stable disease (SD) ≥ 16 weeks was observed in 28.1% of patients (DL1 and DL2, n = 1 each; DL3, n = 7); 12.5% of patients had SD ≥ 23 weeks. Single and repeat-dose pharmacokinetics of lenvatinib were comparable across cycles and with concomitant TMZ administration. CONCLUSIONS: Lenvatinib 24 mg/day + TMZ 150 mg/m2/day (days 1-5) demonstrated modest clinical activity, an acceptable safety profile, and was administered without worsening of either lenvatinib- or TMZ-related toxicities in this patient group.


Asunto(s)
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Dacarbazina/análogos & derivados , Melanoma/tratamiento farmacológico , Compuestos de Fenilurea/administración & dosificación , Quinolinas/administración & dosificación , Adulto , Anciano , Anciano de 80 o más Años , Dacarbazina/administración & dosificación , Dacarbazina/efectos adversos , Relación Dosis-Respuesta a Droga , Femenino , Humanos , Masculino , Dosis Máxima Tolerada , Persona de Mediana Edad , Compuestos de Fenilurea/efectos adversos , Quinolinas/efectos adversos , Temozolomida , Adulto Joven
5.
Clin Cancer Res ; 21(21): 4801-10, 2015 Nov 01.
Artículo en Inglés | MEDLINE | ID: mdl-26169970

RESUMEN

PURPOSE: This "3+3" phase I study evaluated the safety, biologic, and clinical activity of lenvatinib, an oral multikinase inhibitor, in patients with solid tumors. EXPERIMENTAL DESIGN: Ascending doses of lenvatinib were administered per os twice daily in 28-day cycles. Safety and response were assessed for all patients. Angiogenic and apoptotic factors were tested as possible biomarkers in an expanded melanoma cohort. RESULTS: Seventy-seven patients were treated in 3 cohorts: 18 with intermittent twice-daily dosing (7 days on, 7 days off) of 0.1-3.2 mg; 33 with twice-daily dosing of 3.2-12 mg; and 26 with twice-daily dosing of 10 mg (expanded melanoma cohort). Maximum tolerated dose was established at 10 mg per os twice daily. Prominent drug-related toxicities included hypertension (43%), fatigue (42%), proteinuria (39%), and nausea (25%); dose-limiting toxicities included hypertension, fatigue, and proteinuria. Twelve patients (15.6%) achieved partial response (PR, n = 9) or unconfirmed PR (uPR, n = 3), and 19 (24.7%) achieved stable disease (SD) ≥23 weeks. Total PR/uPR/SD ≥23 weeks was 40.3% (n = 31). Responses (PR/uPR) by disease were as follows: melanoma, 5 of 29 patients (includes 1 patient with NRAS mutation); thyroid, 3 of 6 patients; pancreatic, 1 of 2 patients; lung, 1 of 1 patients; renal, 1 of 1 patients; endometrial, 1 of 4 patients; and ovarian, 1 of 5 patients. AUC(0-24) and C(max) increased dose proportionally. In multivariate Cox proportional hazard model analyses, increased baseline systolic blood pressure and decreased angiopoietin-1 ratio (2 hours:baseline) were associated with longer progression-free survival (PFS) in the expanded melanoma cohort (P = 0.041 and P = 0.03, respectively). CONCLUSIONS: The toxicity profile, pharmacokinetics, and antitumor activity of lenvatinib are encouraging. Decreases in the angiopoietin-1 ratio correlated with longer PFS in melanoma patients.


Asunto(s)
Antineoplásicos/administración & dosificación , Melanoma/tratamiento farmacológico , Neoplasias/tratamiento farmacológico , Neoplasias/patología , Compuestos de Fenilurea/administración & dosificación , Inhibidores de Proteínas Quinasas/administración & dosificación , Quinolinas/administración & dosificación , Administración Oral , Adulto , Anciano , Anciano de 80 o más Años , Inhibidores de la Angiogénesis/administración & dosificación , Inhibidores de la Angiogénesis/efectos adversos , Inhibidores de la Angiogénesis/farmacocinética , Antineoplásicos/efectos adversos , Antineoplásicos/farmacocinética , Estudios de Cohortes , Análisis Mutacional de ADN , Femenino , Estudios de Seguimiento , Humanos , Estimación de Kaplan-Meier , Masculino , Dosis Máxima Tolerada , Melanoma/genética , Melanoma/mortalidad , Melanoma/patología , Persona de Mediana Edad , Mutación , Estadificación de Neoplasias , Neoplasias/genética , Neoplasias/mortalidad , Compuestos de Fenilurea/efectos adversos , Compuestos de Fenilurea/farmacocinética , Inhibidores de Proteínas Quinasas/efectos adversos , Inhibidores de Proteínas Quinasas/farmacocinética , Quinolinas/efectos adversos , Quinolinas/farmacocinética , Resultado del Tratamiento
6.
PLoS One ; 7(5): e38033, 2012.
Artículo en Inglés | MEDLINE | ID: mdl-22675430

RESUMEN

PURPOSE: To evaluate clinicopathologic and molecular features of patients with metastatic colorectal cancer (mCRC) and their outcomes in early-phase trials using pathway-targeting agents. PATIENTS AND METHODS: We analyzed characteristics of 238 patients with mCRC referred to the phase 1 trials unit at MD Anderson Cancer Center. KRAS, PIK3CA and BRAF status were tested using PCR-based DNA sequencing. RESULTS: Fifty-one percent of patients harbored KRAS mutations; 15% had PIK3CA mutations. In the multivariate regression model for clinical characteristics KRAS mutations were associated with an increased incidence of lung and bone metastases and decreased incidence of adrenal metastases; PIK3CA mutations were marginally correlated with mucinous tumors (p = 0.05). In the univariate analysis, KRAS and PIK3CA mutations were strongly associated. Advanced Duke's stage (p<0.0001) and KRAS mutations (p = 0.01) were the only significant independent predictors of poor survival (Cox proportional hazards model). Patients with PIK3CA mutations had a trend toward shorter progression-free survival when treated with anti-EGFR therapies (p = 0.07). Eighteen of 78 assessable patients (23%) treated with PI3K/Akt/mTOR axis inhibitors achieved stable disease [SD] ≥6 months or complete response/partial response (CR/PR), only one of whom were in the subgroup (N = 15) with PIK3CA mutations, perhaps because 10 of these 15 patients (67%) had coexisting KRAS mutations. No SD ≥6 months/CR/PR was observed in the 10 patients treated with mitogen-activating protein kinase (MAPK) pathway targeting drugs. CONCLUSIONS: KRAS and PIK3CA mutations frequently coexist in patients with colorectal cancer, and are associated with clinical characteristics and outcome. Overcoming resistance may require targeting both pathways.


Asunto(s)
Antineoplásicos/uso terapéutico , Neoplasias Colorrectales/tratamiento farmacológico , Neoplasias Colorrectales/genética , Fosfatidilinositol 3-Quinasas/genética , Inhibidores de Proteínas Quinasas/uso terapéutico , Proteínas Proto-Oncogénicas/genética , Proteínas ras/genética , Adulto , Anciano , Antineoplásicos/farmacología , Fosfatidilinositol 3-Quinasa Clase I , Neoplasias Colorrectales/mortalidad , Femenino , Humanos , Sistema de Señalización de MAP Quinasas/efectos de los fármacos , Masculino , Persona de Mediana Edad , Mutación , Tasa de Mutación , Metástasis de la Neoplasia , Fosfatidilinositol 3-Quinasas/metabolismo , Inhibidores de Proteínas Quinasas/farmacología , Proteínas Proto-Oncogénicas/metabolismo , Proteínas Proto-Oncogénicas c-akt/metabolismo , Proteínas Proto-Oncogénicas p21(ras) , Transducción de Señal/efectos de los fármacos , Serina-Treonina Quinasas TOR/metabolismo , Resultado del Tratamiento , Proteínas ras/metabolismo
7.
Anticancer Res ; 30(3): 953-61, 2010 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-20393019

RESUMEN

Standard of care for locally advanced non-small cell lung cancer has been concurrent chemoradiation. However, optimal chemotherapy regimen, radiation therapy dose and treatment volume have not been clearly defined despite 30 years of controlled clinical trials. This review analyzes survival and failure pattern reported from randomized studies of chemoradiation for non-small cell lung cancer. Despite introduction of new chemotherapy agents, survival remained poor; rates of both locoregional failures and distant metastasis remained high. The current radiation dose appears insufficient to reliably establish local control. Stereotactic body radiotherapy may allow radiation dose escalation and should be tested in future clinical trials.


Asunto(s)
Carcinoma de Pulmón de Células no Pequeñas/cirugía , Neoplasias Pulmonares/cirugía , Radiocirugia/métodos , Carcinoma de Pulmón de Células no Pequeñas/tratamiento farmacológico , Carcinoma de Pulmón de Células no Pequeñas/radioterapia , Terapia Combinada , Humanos , Neoplasias Pulmonares/tratamiento farmacológico , Neoplasias Pulmonares/radioterapia , Insuficiencia del Tratamiento
8.
Cancer Treat Rev ; 36(6): 485-91, 2010 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-20231058

RESUMEN

Breast cancer stem cells (CSC) have been postulated recently as responsible for failure of breast cancer treatment. The purpose of this study is to review breast CSCs molecular biology with respect to their mechanism of resistance to conventional therapy, and to develop treatment strategies that may improve survival of breast cancer patients. A literature search has identified in vitro and in vivo studies of breast CSCs. Breast CSCs overexpress breast cancer resistance protein (BCRP) which allows cancer cells to transport actively chemotherapy agents out of the cells. Radioresistance is modulated through activation of Wnt signaling pathway and overexpression of genes coding for glutathione. Lapatinib can selectively target HER-2 positive breast CSCs and improves disease-free survival in these patients. Metformin may target basal type breast CSCs. Parthenolide and oncolytic viruses are promising targeting agents for breast CSCs. Future clinical trials for breast cancer should include anti-cancer stem cells targeting agents in addition to conventional chemotherapy. Hypofractionation radiotherapy may be indicated for residual disease post chemotherapy.


Asunto(s)
Neoplasias de la Mama/patología , Resistencia a Antineoplásicos/fisiología , Células Madre Neoplásicas/patología , Tolerancia a Radiación/fisiología , Transducción de Señal/fisiología , Antineoplásicos/metabolismo , Antineoplásicos/uso terapéutico , Neoplasias de la Mama/metabolismo , Neoplasias de la Mama/terapia , Sistemas de Liberación de Medicamentos/métodos , Sistemas de Liberación de Medicamentos/tendencias , Femenino , Humanos , Biología Molecular/métodos , Biología Molecular/tendencias , Células Madre Neoplásicas/efectos de los fármacos , Células Madre Neoplásicas/efectos de la radiación , Virus Oncolíticos/metabolismo , Transducción de Señal/efectos de los fármacos , Transducción de Señal/efectos de la radiación
9.
Anticancer Res ; 29(11): 4683-7, 2009 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-20032420

RESUMEN

UNLABELLED: Platinum-based chemotherapy has been reported to induce diabetes and hyperosmolar coma in nondiabetic patients. The aim of the present study was to determine whether the administration of chemoradiation for head and neck carcinoma alters glucose metabolism during and after treatment. PATIENTS AND METHODS: Weekly nonfasting serum glucose level was obtained during treatment of one hundred and six patients with locally advanced head and neck cancer who underwent chemoradiationt. RESULTS: For the 91 non-diabetic patients, mean serum glucose level measured 97.75 before and 102.1, 102, 104.1, 109.1, 109.7, 110.3, 109.8, 113.2, 107.7 and 104.3 mg/dl during weeks 1-10 of treatment respectively. Serum glucose level elevation reached statistical significance for weeks 5-8. CONCLUSION: Chemoradiation for head and neck cancer may produce severe glucose metabolism alteration during treatment.


Asunto(s)
Protocolos de Quimioterapia Combinada Antineoplásica/efectos adversos , Glucemia/metabolismo , Neoplasias de Cabeza y Cuello/sangre , Neoplasias de Cabeza y Cuello/terapia , Hiperglucemia/inducido químicamente , Adulto , Anciano , Anciano de 80 o más Años , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Glucemia/efectos de los fármacos , Glucemia/efectos de la radiación , Cisplatino/administración & dosificación , Cisplatino/efectos adversos , Terapia Combinada , Femenino , Fluorouracilo/administración & dosificación , Fluorouracilo/efectos adversos , Neoplasias de Cabeza y Cuello/tratamiento farmacológico , Neoplasias de Cabeza y Cuello/radioterapia , Humanos , Hiperglucemia/sangre , Masculino , Persona de Mediana Edad , Mucositis/sangre , Mucositis/inducido químicamente , Radioterapia/efectos adversos , Estudios Retrospectivos
10.
Anticancer Res ; 29(8): 3299-304, 2009 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-19661348

RESUMEN

The aim was to assess the influence of treatment, tumor stages and sites on the severity of dysphagia following treatment. Sequential modified barium swallow (MBS) examinations were performed in patients who complained of chronic dysphagia following treatment of their head and neck cancer. Patients were selected if they were cancer free at their last MBS and had 2 or more MBS studies. Dysphagia severity was graded on a scale of 1 to 7. Dysphagia grade was compared between the first and last MBS to assess its evolution. Between 1996 and 2005, 63 patients with chronic dysphagia underwent MBS to assess dysphagia severity for nutritional support. Twenty-one patients (33%) had improvement of their dysphagia. Two of these patients (3%) achieved normalization of the swallowing. Twenty-five patients (40%) had no change of the dysphagia severity. Dysphagia grade increased in 17 patients (27%). Analysis of patient characteristics did not show any significant difference between these three groups of patients. MBS is a useful tool to monitor dysphagia severity and to identify aspiration risk. Stages of disease and treatment modality do not seem to impact on the course of dysphagia.


Asunto(s)
Antineoplásicos/efectos adversos , Carcinoma de Células Escamosas/complicaciones , Trastornos de Deglución/etiología , Neoplasias de Cabeza y Cuello/complicaciones , Recurrencia Local de Neoplasia/terapia , Adulto , Anciano , Sulfato de Bario , Carcinoma de Células Escamosas/terapia , Terapia Combinada , Deglución , Femenino , Neoplasias de Cabeza y Cuello/terapia , Humanos , Masculino , Persona de Mediana Edad , Recurrencia Local de Neoplasia/patología , Pronóstico , Estudios Retrospectivos , Tasa de Supervivencia , Resultado del Tratamiento
11.
Cancer Invest ; 27(1): 47-51, 2009 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-19160104

RESUMEN

The aim of the study was to assess the aspiration risk following postoperative radiation for head and neck cancer. Thirty-seven patients had Modified Barium Swallow before and following treatment. Dysphagia severity was graded from 1 to 7. Before treatment there were sixteen grade 1, seventeen grade 2, three grade 3 and one grade 5. Following postoperative radiation, two patients had grade 1, eleven patients had grade 2, thirteen patients had grade 3, four patients had grade 4, four patients had grade 5, one patients had grade 6, and two patients had grade 7. Nineteen percent (7/37) of the patients developed aspiration (grade 5-7). Aspiration is life-threatening and may develop for all tumor sites and stages.


Asunto(s)
Carcinoma Adenoide Quístico/radioterapia , Carcinoma de Células Escamosas/radioterapia , Trastornos de Deglución/etiología , Neoplasias de Cabeza y Cuello/radioterapia , Aspiración Respiratoria/etiología , Anciano , Carcinoma Adenoide Quístico/cirugía , Carcinoma de Células Escamosas/cirugía , Trastornos de Deglución/diagnóstico , Femenino , Fluoroscopía , Neoplasias de Cabeza y Cuello/cirugía , Humanos , Masculino , Persona de Mediana Edad , Estadificación de Neoplasias , Complicaciones Posoperatorias , Radioterapia Adyuvante , Aspiración Respiratoria/diagnóstico , Estudios Retrospectivos , Factores de Riesgo
12.
Chemosphere ; 74(7): 1002-10, 2009 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-19108868

RESUMEN

Fish consumption has been classified as one of the primary pathways of exposure to polychlorinated dibenzo-p-dioxins, dibenzofurans (PCDD/Fs) and biphenyls (PCBs). In this study, we evaluated tissue levels of the 17 laterally substituted PCDD/Fs, 12 dioxin-like PCBs, and 97 non-dioxin-like PCBs in a number of wild-caught and farm-raised catfish collected throughout southern Mississippi. Total lipid-adjusted TEQ and non-dioxin-like PCB concentrations in wild-caught catfish fillets were significantly higher than concentrations in farm-raised fillet samples. The percent contribution of PCDDs, PCDFs, and dioxin-like PCBs to mean total TEQ varied between wild-caught and farm-raised samples as well as by collection site for wild-caught catfish. The non-dioxin-like PCBs that contributed the most to total PCB concentrations also differed between wild-caught and farm-raised samples. Regardless of whether samples were farm-raised or wild-caught, estimated cancer risks associated with consumption of these catfish were less than 27.0E-06. Overall, results of this study indicate that levels of dioxin-like compounds and PCBs in Mississippi catfish are similar to those measured in more recent studies in the US and that levels of these compounds appear to be decreasing in this food source.


Asunto(s)
Benzofuranos/análisis , Bagres , Bifenilos Policlorados/análisis , Dibenzodioxinas Policloradas/análogos & derivados , Animales , Dibenzofuranos Policlorados , Productos Pesqueros/análisis , Contaminación de Alimentos , Mississippi , Dibenzodioxinas Policloradas/análisis , Riesgo
13.
Oncology ; 75(3-4): 186-91, 2008.
Artículo en Inglés | MEDLINE | ID: mdl-18841033

RESUMEN

BACKGROUND/AIMS: To identify physician selection factors in the treatment of locally advanced head and neck cancer and how treatment outcome is affected by Tumor Board recommendations. METHODS: A retrospective analysis of 213 patients treated for locally advanced head and neck cancer in a single institution was performed. All treatments followed Tumor Board recommendations: 115 patients had chemotherapy and radiation, and 98 patients received postoperative radiation. Patient characteristics, treatment toxicity, locoregional control and survival between these two treatment groups were compared. Patient survival was compared with survival data reported in randomized studies of locally advanced head and neck cancer. RESULTS: There were no differences in comorbidity factors, and T or N stages between the two groups. A statistically significant number of patients with oropharyngeal and oral cavity tumors had chemoradiation and postoperative radiation, respectively (p < 0.0001). Grade 3-4 toxicities during treatment were 48 and 87% for the postoperative radiation and chemoradiation groups, respectively (p = 0.0001). There were no differences in survival, locoregional recurrences and distant metastases between the two groups. Patient survival was comparable to survival rates reported by randomized studies of locally advanced head and neck cancer. CONCLUSION: Disease sites remained the key determining factor for treatment selection. Multidisciplinary approaches provided optimal treatment outcome for locally advanced head and neck cancer, with overall survival in these patients being comparable to that reported in randomized clinical trials.


Asunto(s)
Carcinoma de Células Escamosas/terapia , Adhesión a Directriz , Neoplasias de Cabeza y Cuello/terapia , Recurrencia Local de Neoplasia/terapia , Servicio de Oncología en Hospital/normas , Adulto , Anciano , Anciano de 80 o más Años , Antineoplásicos/uso terapéutico , Carcinoma de Células Escamosas/tratamiento farmacológico , Carcinoma de Células Escamosas/radioterapia , Carcinoma de Células Escamosas/cirugía , Cisplatino/uso terapéutico , Terapia Combinada , Femenino , Neoplasias de Cabeza y Cuello/tratamiento farmacológico , Neoplasias de Cabeza y Cuello/radioterapia , Neoplasias de Cabeza y Cuello/cirugía , Humanos , Escisión del Ganglio Linfático , Masculino , Persona de Mediana Edad , Recurrencia Local de Neoplasia/tratamiento farmacológico , Recurrencia Local de Neoplasia/radioterapia , Recurrencia Local de Neoplasia/cirugía , Estadificación de Neoplasias , Guías de Práctica Clínica como Asunto , Pronóstico , Estudios Retrospectivos , Tasa de Supervivencia
14.
Oncology ; 74(1-2): 25-30, 2008.
Artículo en Inglés | MEDLINE | ID: mdl-18544956

RESUMEN

BACKGROUND: Dysphagia and aspiration are long-term complications with life-threatening consequences following treatment of head and neck cancer. We would like to assess the prevalence of aspiration in patients with long-term persistence of dysphagia (1 year or more) following treatment for head and neck cancer and to identify potential risk factors of aspiration. METHODS: Modified barium swallow (MBS) examinations were performed in cancer-free patients who complained of dysphagia following treatment for head and neck cancer. The severity of the dysphagia was graded on a scale of 1-7. RESULTS: Between 1992 and 2004, 74 patients with dysphagia underwent MBS 12-152 months following treatment (median 29 months). There were 2 grade 1, 22 grade 3, 21 grade 4, 11 grade 5, 7 grade 6, and 11 grade 7 cases. Twenty-nine patients (39%) had long-term aspiration at a median follow-up of 25 months (range 12-82). Eighteen patients (24%) required permanent gastrostomy because of severe aspiration. Type of treatment and disease stage did not seem to influence long-term aspiration risk. CONCLUSION: Patients with long-term dysphagia after treatment for head and neck cancer are at risk of aspiration. MBS should be performed to identify these patients.


Asunto(s)
Trastornos de Deglución/etiología , Neoplasias de Cabeza y Cuello/terapia , Adulto , Anciano , Anciano de 80 o más Años , Trastornos de Deglución/clasificación , Trastornos de Deglución/complicaciones , Femenino , Neoplasias de Cabeza y Cuello/complicaciones , Humanos , Masculino , Persona de Mediana Edad , Estadificación de Neoplasias , Complicaciones Posoperatorias , Traumatismos por Radiación , Estudios Retrospectivos , Factores de Riesgo
15.
Anticancer Res ; 28(1B): 431-4, 2008.
Artículo en Inglés | MEDLINE | ID: mdl-18383881

RESUMEN

UNLABELLED: The aim of the present study was to assess dysphagia severity following postoperative radiation for locally advanced oropharyngeal cancer. PATIENTS AND METHODS: Eighteen patients with oropharyngeal carcinoma had undergone postoperative radiation. There were eight base of tongue, eight tonsils, and two soft palate carcinomas. All the patients had undergone modified barium swallow (MBS) to assess the persistence of dysphagia (more than one month) post-treatment. All the patients were cancer-free at the time of the swallowing study. Dysphagia severity was graded as 1-7. RESULTS: At a median follow-up of 12 months, there were three grade 2, four grade 3, two grade 4, five grade 5, two grade 6, and two grade 7. Only three patients (17%) had normal swallow post-treatment. Six patients (33%) had mild to moderate dysphagia (grade 3-4). Nine patients (50%) developed aspiration (grade 5-7). Among the patients who developed aspiration, four (22%) required tube feeding for severe aspiration. CONCLUSION: Long-term (more than one year) dysphagia following postoperative radiation for oropharyngeal cancer may be symptomatic of permanent damage to the swallowing mechanism. Evaluation of patients who complain of persistence of dysphagia a year or more following treatment should include MBS, because of the increased risk of aspiration.


Asunto(s)
Trastornos de Deglución/etiología , Neoplasias Orofaríngeas/complicaciones , Anciano , Terapia Combinada , Estudios de Seguimiento , Humanos , Masculino , Persona de Mediana Edad , Neoplasias Orofaríngeas/radioterapia , Neoplasias Orofaríngeas/cirugía
16.
J Otolaryngol Head Neck Surg ; 37(2): 219-24, 2008 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-19128616

RESUMEN

OBJECTIVE: To evaluate the risk and outcome of pharyngoesophageal stenosis in patients who complained of dysphagia following radiation for head and neck cancer. DESIGN: Retrospective study. SETTING: Veterans Administration hospital. PATIENTS: Patients who complained of persistent dysphagia following radiation alone or combined with surgery or chemotherapy for head and neck cancer. Patients were selected if they were cancer free at the time of the swallowing study. All patients had modified barium swallow (MBS) and an endoscopic examination for initial evaluation of their dysphagia. Traditional barium swallow was requested when there was a suspicion of pharyngoesophageal stenosis on MBS. RESULTS: Two hundred twenty-two patients underwent MBS for evaluation of dysphagia posttreatment. Traditional barium swallow confirmed the diagnosis of pharyngeal (n = 2) or esophageal (n = 14) stenosis in 16 patients. Eight patients had esophageal stenosis on endoscopic examination. All patients underwent dilatation for relief of their dysphagia. The number of dilatations performed was, respectively, one in 12 patients, two in 4 patients, three in 3 patients, four in 3 patients, five in one patient, and six in one patient. CONCLUSION: Pharyngeal and/or cervical esophageal stenosis may be the cause of dysphagia following radiation for head and neck cancer. Esophageal dilatations often offer temporary relief of the dysphagia.


Asunto(s)
Estenosis Esofágica/epidemiología , Esófago/efectos de la radiación , Neoplasias de Oído, Nariz y Garganta/radioterapia , Enfermedades Faríngeas/epidemiología , Faringe/efectos de la radiación , Traumatismos por Radiación/epidemiología , Adulto , Anciano , Anciano de 80 o más Años , Sulfato de Bario , Terapia Combinada , Constricción Patológica/diagnóstico por imagen , Constricción Patológica/epidemiología , Constricción Patológica/terapia , Medios de Contraste , Estudios Transversales , Trastornos de Deglución/diagnóstico por imagen , Trastornos de Deglución/epidemiología , Dilatación , Estenosis Esofágica/diagnóstico por imagen , Estenosis Esofágica/terapia , Esófago/diagnóstico por imagen , Femenino , Estudios de Seguimiento , Humanos , Masculino , Persona de Mediana Edad , Estadificación de Neoplasias , Neoplasias de Oído, Nariz y Garganta/tratamiento farmacológico , Neoplasias de Oído, Nariz y Garganta/patología , Neoplasias de Oído, Nariz y Garganta/cirugía , Enfermedades Faríngeas/diagnóstico por imagen , Enfermedades Faríngeas/terapia , Faringe/diagnóstico por imagen , Traumatismos por Radiación/diagnóstico por imagen , Traumatismos por Radiación/terapia , Radiografía , Estudios Retrospectivos , Estados Unidos
17.
J Otolaryngol Head Neck Surg ; 37(2): 225-9, 2008 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-19128617

RESUMEN

OBJECTIVE: We assessed the rate of aspiration following radiation for non-nasopharyngeal head and neck cancer. DESIGN: Retrospective study. SETTING: Veterans Administration Hospital. PATIENTS: Thirty-three patients who underwent radiation for head and neck cancer. Modified barium swallow was performed prior to and following treatment to assess the persistence of dysphagia and aspiration risk. All patients were cancer free at the time of the swallowing study. Dysphagia severity was graded from 1 to 7. RESULTS: Preradiation baseline dysphagia was observed as follows: 10 grade 1, 14 grade 2, 9 grade 3, and 1 grade 4. Following radiation, at a median follow-up of 3 months, nine patients had grade 1, eight patients had grade 2, six patients had grade 3, two patients had grade 4, three patients had grade 5, two patients had grade 6, and three patients had grade 7. Overall, 24% (8 of 33) of the patients developed aspiration (grades 5-7). Fifteen percent (5 of 33) of the patients had severe aspiration (grades 6-7) requiring tube feedings. All patients who developed severe aspiration continued to require tube feedings more than 1 year following treatment completion. CONCLUSION: Aspiration is a significant source of morbidity following radiation for non-nasopharyngeal head and neck cancer. Aspiration may develop for all tumour stages or sites. Diagnostic studies such as modified barium swallow should be included in future prospective head and neck cancer studies to assess the prevalence of aspiration because of its often silent nature.


Asunto(s)
Carcinoma de Células Escamosas/radioterapia , Neoplasias de Oído, Nariz y Garganta/radioterapia , Neumonía por Aspiración/etiología , Traumatismos por Radiación/etiología , Anciano , Anciano de 80 o más Años , Carcinoma de Células Escamosas/patología , Estudios Transversales , Trastornos de Deglución/epidemiología , Trastornos de Deglución/etiología , Fraccionamiento de la Dosis de Radiación , Estudios de Seguimiento , Humanos , Masculino , Persona de Mediana Edad , Estadificación de Neoplasias , Neoplasias de Oído, Nariz y Garganta/patología , Neumonía por Aspiración/epidemiología , Traumatismos por Radiación/epidemiología , Dosificación Radioterapéutica , Estudios Retrospectivos , Texas
18.
Lung ; 185(5): 243-248, 2007.
Artículo en Inglés | MEDLINE | ID: mdl-17661135

RESUMEN

The effectiveness of the cough reflex in patients who aspirated following radiation for head and neck cancer was evaluated in 89 patients (49 chemoradiation, 33 postoperative radiation, and 7 radiation alone). All patients had modified barium swallow because of dysphagia. The cough reflex was graded as present and effective, ineffective, intermittently effective, or absent. All patients were cancer-free at the time of the swallowing study. The cough reflex was present and effective in 46 patients (52%), ineffective in 17 patients (19%), and absent in 26 patients (29%) on initial investigation. Among the 43 patients who had ineffective or absent cough reflex, their treatment was chemoradiation (26), postoperative radiation (13), and radiation alone (4). In 30 patients who had sequential modified barium swallow, the cough reflex was constantly effective, ineffective, or intermittently effective in 12 (40%), 13 (43%), and 5 (17%) patients, respectively. The cough reflex was frequently ineffective or absent in patients who aspirated following radiation for head and neck cancer. Cough may also be intermittently ineffective to protect the airways following radiation.


Asunto(s)
Tos/fisiopatología , Irradiación Craneana/efectos adversos , Trastornos de Deglución/complicaciones , Neoplasias de Cabeza y Cuello/radioterapia , Aspiración Respiratoria/fisiopatología , Adulto , Anciano , Anciano de 80 o más Años , Trastornos de Deglución/etiología , Trastornos de Deglución/fisiopatología , Femenino , Neoplasias de Cabeza y Cuello/fisiopatología , Humanos , Masculino , Persona de Mediana Edad , Radioterapia Adyuvante/efectos adversos , Reflejo , Aspiración Respiratoria/etiología , Estudios Retrospectivos
19.
Artículo en Inglés | MEDLINE | ID: mdl-17565229

RESUMEN

BACKGROUND: To evaluate the impact of chemoradiation and postoperative radiation on patients' quality of life (QOL) in a single institution. METHODS: A retrospective analysis of 101 patients who had treatment for locally advanced head and neck cancer in a single institution. Forty-seven patients had chemotherapy and radiation, 54 patients underwent postoperative radiation. QOL was assessed with the University of Washington (UW), and the Hospital Anxiety (HA) and Depression (HD) questionnaires. All patients were free of disease at the survey time. RESULTS: Mean and median UW scores were not different between the 2 groups: chemoradiation (65/67), postoperative radiation (62/63). Mean and median HA scores were 7.6/7 (chemoradiation), and 8.3/8 (postoperative radiation). Mean and median HD scores were 6.7/7 (chemoradiation), and 7.1/7 (postoperative radiation). Forty-four patients developed complications, with mean/median UW, HA, and HD scores of 55/55, 9.9/8, and 8.9/9, respectively. These scores were significantly different compared to the 57 patients without complications: 70/70 (p = 0.0001), 6.5/6 (p = 0.001), and 8.9/9 (p = 0.0001). CONCLUSION: There was no significant difference in QOL between chemoradiation and postoperative radiation in this retrospective study with a relatively short follow-up in the chemoradiation group. In addition, there were more patients with resectable disease in the postoperative group which may explain the lack of difference in QOL between the two groups. Patients who developed complications following treatment experienced lower QOL, more anxiety and depression. Our study raised the need to conduct a prospective randomized study to assess the real impact of chemoradiation and postoperative radiation on patients' QOL.


Asunto(s)
Neoplasias de Cabeza y Cuello/tratamiento farmacológico , Neoplasias de Cabeza y Cuello/radioterapia , Cuidados Posoperatorios , Calidad de Vida/psicología , Adulto , Anciano , Anciano de 80 o más Años , Ansiedad/diagnóstico , Ansiedad/epidemiología , Ansiedad/psicología , Terapia Combinada , Estenosis Esofágica/epidemiología , Estenosis Esofágica/etiología , Femenino , Neoplasias de Cabeza y Cuello/rehabilitación , Hospitalización/estadística & datos numéricos , Humanos , Masculino , Persona de Mediana Edad , Radioterapia/efectos adversos , Estudios Retrospectivos , Traumatismos de los Tejidos Blandos/etiología , Encuestas y Cuestionarios
20.
Anticancer Res ; 27(3B): 1669-72, 2007.
Artículo en Inglés | MEDLINE | ID: mdl-17595794

RESUMEN

AIM: To assess the risk of developing aspiration during chemoradiation for head and neck cancer. PATIENTS AND METHODS: A retrospective review of 114 patients who underwent concurrent chemoradiation for locally advanced head and neck cancer was undertaken. Patients were determined as having aspiration if they had pneumonia on chest-X-ray (CXR) and/or had documented aspiration on the modified barium swallow (MBS) during their treatment. RESULTS: Fifteen patients (13%) developed aspiration during chemoradiation. Twelve patients (10%) had aspiration demonstrated on CXR alone (9 patients) or combined with MBS (3 patients). Three patients (3%) had aspiration on MBS alone. Three of the six patients with aspiration observed on MBS had normal swallowing on their pretreatment MBS. All 15 patients had severe mucositis and neutropenia at the time of the aspiration. Despite broad-spectrum antibiotics and supportive care, six patients (5%) died. CONCLUSION: Aspiration may develop during chemoradiation for head and neck cancer because of radiation-induced altered swallow.


Asunto(s)
Neoplasias de Cabeza y Cuello/radioterapia , Neumonía por Aspiración/epidemiología , Aspiración Respiratoria/epidemiología , Adulto , Anciano , Terapia Combinada , Femenino , Neoplasias de Cabeza y Cuello/tratamiento farmacológico , Humanos , Incidencia , Masculino , Persona de Mediana Edad , Neumonía por Aspiración/diagnóstico por imagen , Neumonía por Aspiración/etiología , Radiografía , Radioterapia/efectos adversos , Aspiración Respiratoria/diagnóstico por imagen , Aspiración Respiratoria/etiología , Riesgo
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