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1.
Clin Oncol (R Coll Radiol) ; 34(7): e298-e304, 2022 07.
Artículo en Inglés | MEDLINE | ID: mdl-35210133

RESUMEN

AIMS: Radiation therapy can be used with curative intent in patients with low-grade orbital non-Hodgkin's lymphoma (NHL) stages IE and IVE (limited to the bilateral orbits). This study evaluated local control and survival outcomes of patients with unilateral or bilateral orbital lymphoma treated in a provincial population. MATERIALS AND METHODS: The study subjects were 176 patients with low-grade orbital or conjunctival lymphoma referred for management from 1980 to 2016. Demographic, tumour and treatment characteristics were abstracted by chart review. Recurrence-free survival (RFS) and overall survival were assessed with competing risks analysis and Gray's test. RESULTS: The median follow-up was 8.5 years (range 0.4-29.5 years). The median age at diagnosis was 65 years (range 20-97 years). The most common histological subtype was mucosa-associated lymphoid tissue (MALT) (73%). Stage IVE accounted for 20.5% of the cohort. Orbital radiation therapy was used in 122 patients with stage IE (87%) and 12 patients with stage IVE (28%). The median dose was 25 Gy (range 2-35 Gy). Other treatments were antibiotics (seven patients), chemotherapy (10 patients), radioimmunotherapy (six patients), surgery (three patients) and observation (16 patients). Within the group treated with orbital external beam radiation therapy (EBRT) there were no local recurrences. Among those with stage IE NHL, EBRT was associated with improved local RFS (P ≤ 0.001) but did not have an impact on contralateral or distant RFS. In patients with stage IVE NHL limited to the bilateral orbit, bilateral EBRT was associated with improved RFS (P = 0.012) but did not affect distant recurrences or overall survival. CONCLUSION: There were no local recurrences after EBRT for stage IE and IVE orbital low-grade NHL. The treatments offered over the study period varied, but only EBRT for stage IVE disease improved RFS. This supports EBRT as the preferred primary treatment for patients with localised orbital low-grade lymphoma, including those with bilateral disease.


Asunto(s)
Linfoma no Hodgkin , Neoplasias Orbitales , Adulto , Anciano , Anciano de 80 o más Años , Humanos , Linfoma , Linfoma no Hodgkin/tratamiento farmacológico , Linfoma no Hodgkin/radioterapia , Persona de Mediana Edad , Órbita/patología , Neoplasias Orbitales/radioterapia , Recurrencia , Estudios Retrospectivos , Resultado del Tratamiento , Adulto Joven
2.
Clin Oncol (R Coll Radiol) ; 33(12): e561-e569, 2021 12.
Artículo en Inglés | MEDLINE | ID: mdl-34226113

RESUMEN

AIMS: Induction ipilimumab and nivolumab followed by maintenance nivolumab improve overall survival compared with ipilimumab alone in patients with advanced melanoma, but immune-related adverse events (irAE) occur commonly. The need for induction discontinuation because of irAE and the relationship between irAE and survival in non-trials patients are unclear. MATERIALS AND METHODS: Patients with unresectable stage III-IV melanoma receiving first-line combination immunotherapy at one of six centres between December 2017 and February 2020 outside of trials were identified retrospectively. Landmark 12-week Kaplan-Meier analyses and log-rank tests were used to evaluate associations between discontinuation of induction therapy on overall survival and time to treatment failure (TTF). Multivariable analysis of factors influencing overall survival and TTF was undertaken. RESULTS: Among 95 patients, the median age was 62 years, 38.9% had Eastern Cooperative Oncology Group performance status ≥1 and 22.1% had brain metastases. The median follow-up for the whole cohort was 19.8 months by the reverse Kaplan-Meier method. Any grade and grade 3-4 irAE were noted in 78.9% and 44.2% of the cohort, respectively. 44.2% of patients completed induction immunotherapy, whereas 41.1% did not due to irAE. Twelve-week landmark overall survival and TTF were similar in patients who completed induction versus those who did not due to irAE. On multivariable analysis, any grade irAE (versus none) was associated with longer overall survival (hazard ratio = 0.35, 95% confidence interval 0.15-0.82, P = 0.02) and TTF (hazard ratio = 0.38, 95% confidence interval = 0.17-0.81, P = 0.01). Grade 3-4 irAE correlated with longer TTF (hazard ratio = 0.45, 95% confidence interval = 0.20-1.01, P = 0.05). CONCLUSION: In this population-based cohort, discontinuation of induction immunotherapy as a result of irAE did not adversely affect overall survival or TTF. irAE observed during ipilimumab and nivolumab induction were associated with improved survival outcomes.


Asunto(s)
Melanoma , Nivolumab , Protocolos de Quimioterapia Combinada Antineoplásica , Humanos , Ipilimumab/efectos adversos , Melanoma/tratamiento farmacológico , Persona de Mediana Edad , Nivolumab/efectos adversos , Estudios Retrospectivos
3.
Curr Oncol ; 27(2): 76-82, 2020 04.
Artículo en Inglés | MEDLINE | ID: mdl-32489249

RESUMEN

Background: Although PD-1 antibodies (PD1 Ab) are the standard of care for advanced non-small-cell lung cancer (ansclc), most patients will progress. We compared survival outcomes for patients with ansclc who received systemic therapy (st) after progression and for those who did not. Additionally, clinical characteristics that predicted receipt of st after PD1 Ab failure were evaluated. Methods: All patients with ansclc in British Columbia initiated on nivolumab or pembrolizumab between June 2015 and November 2017, with subsequent progression, were identified. Eligibility criteria for additional st included an Eastern Cooperative Oncology Group (ecog) performance status (ps) of 3 or less and survival for more than 30 days from the last PD1 Ab treatment. Post-progression survival (pps) was assessed by landmark analysis. Baseline characteristics associated with pps were identified by multivariable analysis. Results: Of 94 patients meeting the eligibility criteria, 33 received st after progression. In 75.6%, a PD1 Ab was received as first- or second-line treatment. The most common sts were erlotinib (36.4%) and docetaxel (27.3%). No statistically significant difference in median pps was observed between patients who did and did not receive st within 30 days of their last PD1 Ab treatment (6.9 months vs. 3.6 months, log-rank p = 0.15.) In multivariable analysis, factors associated with increased pps included an ecog ps of 0 or 1 compared with 2 or 3 [hazard ratio (hr): 0.42; 95% confidence interval (ci): 0.24 to 0.73; p = 0.002] and any response compared with no response to PD1 Ab (hr: 0.54; 95% ci: 0.33 to 0.90; p = 0.02). Conclusions: In this cohort, only 35.1% of patients eligible for post-PD1 Ab therapy received st. Post-progression survival was not significantly affected by receipt of post-progression therapy. Prospective trials are needed to clarify the benefit of post-PD1 Ab treatments.


Asunto(s)
Anticuerpos Monoclonales Humanizados/uso terapéutico , Carcinoma de Pulmón de Células no Pequeñas/tratamiento farmacológico , Neoplasias Pulmonares/tratamiento farmacológico , Nivolumab/uso terapéutico , Adulto , Anciano , Anciano de 80 o más Años , Anticuerpos Monoclonales Humanizados/farmacología , Progresión de la Enfermedad , Femenino , Humanos , Masculino , Persona de Mediana Edad , Nivolumab/farmacología
4.
Cancer Radiother ; 22(2): 112-119, 2018 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-29523388

RESUMEN

PURPOSE: Phyllodes tumors of the breast are uncommon fibroepithelial lesions for which optimal management remains unclear. This retrospective population-based study reports treatment and outcomes for patients with phyllodes tumors and evaluates characteristics that influence outcome. MATERIALS AND METHODS: Data were analysed on 183 patients with newly diagnosed phyllodes tumors from 1999 to 2014. Five-year Kaplan-Meier local recurrence and survival were compared between cohorts with benign (n=83), borderline (n=50) and malignant phyllodes tumor (n=49) histology. RESULTS: Median (range) follow-up was 65 (0.5-197) months. Local excision was performed in 163 and mastectomy in 19 patients. Eleven patients with malignant phyllodes tumors received radiation therapy. Overall, local recurrence occurred in 8.7%, distant metastases in 4.4%, and cause specific deaths in 3.8%. Five-year Kaplan-Meier outcomes among women with benign, borderline, and malignant phyllodes tumors were: local recurrence 6% vs 9% vs 21%, P=0.131; overall survival 96% vs 100% vs 82%, P=0.002; and disease-free survival 94% vs 91% vs 67%, P<0.001. Five-year Kaplan-Meier local recurrence among women with negative vs close vs positive margins were 8% vs 6% vs 37%, P<0.001. Corresponding rates for intermediate vs pushing vs infiltrative borders were 6% vs 6% vs 33%, P=0.006. Positive margins and infiltrative tumor borders were associated with increased local recurrence (all P≤0.006), and the latter remained significant in exploratory analyses after adjusting for margin status and phyllodes tumor classification. CONCLUSIONS: Five-year outcomes among women with phyllodes tumors were comparable to those reported in the literature. Exploratory analysis has suggested that infiltrative tumor borders may be used in conjunction with margin status to assess local recurrence risk.


Asunto(s)
Neoplasias de la Mama/patología , Neoplasias de la Mama/terapia , Tumor Filoide/patología , Tumor Filoide/terapia , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Neoplasias de la Mama/mortalidad , Colombia Británica , Femenino , Estudios de Seguimiento , Humanos , Márgenes de Escisión , Mastectomía/estadística & datos numéricos , Mastectomía Segmentaria/estadística & datos numéricos , Persona de Mediana Edad , Recurrencia Local de Neoplasia , Tumor Filoide/mortalidad , Radioterapia Adyuvante/estadística & datos numéricos , Estudios Retrospectivos , Adulto Joven
5.
Ann Oncol ; 26(9): 1898-1903, 2015 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-26063632

RESUMEN

BACKGROUND: In 1999, the National Surgical Adjuvant Breast and Bowel Project (NSABP)-B24 trial demonstrated that tamoxifen reduced relapse risk in women with ductal carcinoma in situ (DCIS) treated with breast-conserving surgery (BCS) and radiotherapy (RT). In 2002, Allred's subgroup analysis showed that tamoxifen mainly benefitted estrogen receptor (ER)-positive disease. This study evaluates the impact and generalizability of these trial findings at the population level. PATIENTS AND METHODS: From 1989 to 2009, 2061 women with DCIS underwent BCS + RT in British Columbia. The following cohorts were analyzed: (1) pre-NSABP-B24 era (1989-1998, N = 417); (2) post-NSABP-B24 era (2000-2009, N = 1548). Cohort 2 was further divided into pre- and post-Allred eras. RESULTS: Endocrine therapy (ET) was used in 404/2061 (20%) patients. Median age of patients treated with compared with without ET, was 53 versus 57 years, (P < 0.0005). One of 417 (0.2%) versus 399/1548 (26%) patients took ET before versus after NSABP-B24. Among the post-Allred era cohort treated with ET (N = 227), tumors were ER-positive in 65%, ER-negative in 1%, and ER-unknown in 33%; whereas of those treated without ET (N = 801), ER was positive in 43%, negative in 15%, and unknown in 42% (P < 0.0005). On multivariable analysis of the post-NSABP-B24 era, ET was associated with improved event-free survival (EFS) (hazard ratio 0.6; P = 0.02); 5-year EFS were 96.9% with ET versus 94.5% without ET. CONCLUSIONS: ET use in DCIS patients treated with BCS + RT increased significantly after the NSABP-B24 study. ER+ disease and younger age were associated with increased ET use. ET was associated with improved EFS, confirming the generalizability of trial data at a population level.


Asunto(s)
Antineoplásicos Hormonales/uso terapéutico , Neoplasias de la Mama/terapia , Carcinoma Intraductal no Infiltrante/terapia , Quimioradioterapia/métodos , Tamoxifeno/uso terapéutico , Adulto , Anciano , Anciano de 80 o más Años , Supervivencia sin Enfermedad , Femenino , Humanos , Mastectomía Segmentaria , Persona de Mediana Edad , Recurrencia Local de Neoplasia
6.
Pediatr Surg Int ; 30(6): 605-8, 2014 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-24722760

RESUMEN

PURPOSE: Apparently superior result was observed after open Kasai portoenterostomy in infant with biliary atresia. Our institute stopped performing laparoscopic portoenterostomy since 2007. We aimed to investigate the outcome after reintroduction of open portoenterostomy. METHODS: 27 non-syndromic infants underwent open Kasai portoenterostomy from 2007 to 2012. The age and the sex of the patient, the bilirubin level before the operation, the early clearance of jaundice (total bilirubin <20 µmol/L within 6 month of portoenterostomy), the native liver survival at 2 years after the operation were reviewed. The results were retrospectively compared with all 16 infants who underwent laparoscopic Kasai portoenterostomy before 2007. RESULTS: All infants had type III biliary atresia. No statistical difference was observed regarding the age at operation and the pre-operative bilirubin level. The early clearance of jaundice rate was 81% (22/27) after open operation and was 50% (8/16) after laparoscopic operation (p = 0.03). At 2 years after the operation, the native liver survival was 81% (22/27) after open operation and was 50% (8/16) after laparoscopic operation (p = 0.03). CONCLUSION: Reintroduction of open Kasai portoenterostomy was associated with superior early clearance of jaundice rate and 2-year native liver survival rate.


Asunto(s)
Atresia Biliar/cirugía , Laparoscopía/métodos , Portoenterostomía Hepática/métodos , Bilirrubina/análisis , Biomarcadores/análisis , Femenino , Humanos , Lactante , Masculino , Tasa de Supervivencia , Resultado del Tratamiento
7.
Pediatr Surg Int ; 28(11): 1109-13, 2012 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-22987040

RESUMEN

PURPOSE: Laparoscopic Kasai portoenterostomy was reported to be a safe and feasible procedure in infant with biliary atresia. We aimed to investigate the long-term results after laparoscopic portoenterostomy as such data in the literature are lacking. METHODS: Sixteen infants underwent laparoscopic Kasai portoenterostomy from 2002 to 2006. The age and the sex of the patient, the bilirubin level before the operation, the early clearance of jaundice (total bilirubin <20 µmol/L within 6 months of portoenterostomy), the native liver survival at 2 and 5 years after the operation were reviewed. The results were retrospectively compared with 16 consecutive infants who underwent open Kasai portoenterostomy before 2002. RESULTS: All infants had type III biliary atresia. The early clearance of jaundice rate at 6 months was 50 % (8/16) after laparoscopic operation and was 75 % (12/16) after open operation (p = 0.144). Two years after the operation, the native liver survival was 50 % (8/16) in the laparoscopic group and was 81 % (13/16) in the open group (p = 0.076). Five years after the operation, the native liver survival rate was 50 % (8/16) in the laparoscopic group and was 81 % (13/16) in the open group (p = 0.076). The jaundice-free native liver survival rate at 5 years was 50 % (8/16) in laparoscopic group and was 75 % (12/16) in the open group. In the laparoscopic group, all patients with early clearance of jaundice survived and remained jaundice freed 5 years after the operation. CONCLUSION: The 5-year native liver survival rate after laparoscopic portoenterostomy was 50 %. Apparently superior result was observed in the open group (81 %) although the figures did not reach statistical difference because of the small sample size. A larger scale study is required to draw a more meaningful conclusion.


Asunto(s)
Atresia Biliar/cirugía , Laparoscopía , Portoenterostomía Hepática , Femenino , Humanos , Lactante , Hígado/fisiología , Masculino , Estudios Retrospectivos , Factores de Tiempo
8.
Curr Oncol ; 18(5): e218-26, 2011 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-21980253

RESUMEN

BACKGROUND AND OBJECTIVES: Increasing numbers of women are surviving breast cancer, and survivorship care is becoming more complex. Primary care physicians provide care for most survivors of breast cancer in the Canadian province of British Columbia. The present study offers insight into the confidence of primary care physicians in their abilities to provide such care. It also explores potential ways to assist those providers in enhancing this aspect of their practice. METHODS: A questionnaire was mailed to 1000 primary care physicians caring for survivors of breast cancer. The questionnaire explored the perspectives of the responding physicians on their ability to manage various aspects of survivorship care for breast cancer patients, identified preferences for the content and format of communication from oncologists at the time of transition from active oncology treatment to survivorship, and determined the means most commonly used to obtain knowledge about breast cancer. This 1-page, 31-item checkbox and open-answer questionnaire assessed the perceptions of primary care physicians about the care of breast cancer survivors after completion of active treatment and their personal preferences for resources providing information about breast cancer. RESULTS: The questionnaire response rate was 59%. Primary care physicians reported being most confident in screening for recurrence and managing patient anxiety; they were least confident in managing lymphedema and providing psychosocial counselling. Compared with physicians following fewer survivors of breast cancer, those who followed more breast cancer survivors had higher confidence in managing the biomedical aspects of follow-up and in providing counselling about nutrition and exercise. Most physicians found discharge letters from oncologists to be useful. Point-form discharge information was preferred by 43%; detailed description, by 19%; and both formats, by 38%. The most useful information items identified for inclusion in a discharge letter were a diagnosis and treatment summary and the recommended surveillance and endocrine therapy. Continuing medical education events and online resources were the means most commonly used to obtain knowledge about breast cancer. CONCLUSIONS: Primary care physicians who provide follow-up for survivors of breast cancer report that they are confident in managing care and satisfied with discharge letters containing a diagnosis and treatment summary, and recommendations for surveillance and endocrine treatment. At the time of patient discharge, additional information about common medical and psychosocial issues in this patient population would be useful to primary care physicians. Preferred means to access current breast cancer information include continuing medical education events and online resources.

9.
Occup Med (Lond) ; 61(8): 541-8, 2011 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-21727180

RESUMEN

BACKGROUND: Although various occupational physical activities are suspected of contributing to low back pain (LBP), causal relationships have not been confirmed, complicating adjudication of work injuries, return to work instructions and preventive efforts. AIMS: To summarize eight systematic review (SR) reports that examined evidence supporting causal relationships between bending/twisting, awkward postures, sitting, standing/walking, carrying, pushing/pulling, lifting and manual handling/assisting patients and LBP. METHODS: A literature search was conducted to identify eligible studies. Methodological quality was assessed using a modified Newcastle-Ottawa Scale (NOS). Levels of evidence supporting factors for causation were examined using a Bradford Hill framework. Results were presented in eight SR reports, each focused on one or more related physical activities. This study summarizes findings from those reports and offers clinicians an overview. RESULTS: Collectively, the eight SR reports included 99 studies. None found strong evidence supporting a causal relationship between any occupational physical activity considered and LBP. Conflicting evidence was found between LBP and bending, twisting, lifting or pushing/pulling, but only for statistical association, not causation. Strong evidence against a causal relationship was found between LBP and manual handling/assisting patients, awkward postures, carrying, sitting, standing or walking. CONCLUSIONS: Although occupational physical activities are suspected of causing LBP, findings from the eight SR reports did not support this hypothesis. This may be related to insufficient or poor quality scientific literature, as well as the difficulty of establishing causation of LBP. These population-level findings do not preclude the possibility that individuals may attribute their LBP to specific occupational physical activities.


Asunto(s)
Dolor de la Región Lumbar/etiología , Actividad Motora , Enfermedades Profesionales/etiología , Exposición Profesional/efectos adversos , Actividades Cotidianas , Humanos , Elevación/efectos adversos , Postura/fisiología
10.
Lung Cancer ; 72(1): 39-44, 2011 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-20801544

RESUMEN

PURPOSE: To evaluate comorbidities, patterns of care and outcomes for patients with inoperable stage I and II non-small cell lung cancer (NSCLC). MATERIALS AND METHODS: Patients diagnosed with stage I or II NSCLC in British Columbia between 1996 and 2005 who did not undergo primary surgery and were referred for oncology assessment were identified in a retrospective analysis. Baseline comorbidity and pulmonary function data for patients treated with curative radiotherapy (CurRT; biologically effective dose [BED]>58 Gy(10)) were abstracted by chart review. Kaplan-Meier and Cox regression were used to determine factors associated with overall survival (OS) and cause-specific survival (CSS) based on treatment group [no radiotherapy (NoRT), palliative radiotherapy (PallRT), or CurRT]. RESULTS: Of 1043 patients identified, approximately 1/3 received CurRT, and these patients had better performance status and lower stage disease than the other groups. There was a high prevalence of comorbid conditions in the CurRT group; 90% of CurRT patients had an age-adjusted Charlson comorbidity index (CCI) score ≥5. CurRT patients had a median survival 1-year longer than patients treated with PallRT or NoRT (p < 0.0001). In CurRT patients, CCI was predictive of OS (HR 1.1 per point CCI increase; p = 0.044), but not CSS. Patients receiving PallRT with a BED > 50 Gy(10) had significantly longer OS than those receiving PallRT of ≤50 Gy(10) (p < 0.0001). CONCLUSIONS: Treatment of medically inoperable early stage NSCLC patients with CurRT is associated with a significantly longer survival, and for these patients CCI is a significant predictor of OS. For patients treated with PallRT, higher doses of palliative thoracic RT is associated with improved OS.


Asunto(s)
Carcinoma de Pulmón de Células no Pequeñas/mortalidad , Carcinoma de Pulmón de Células no Pequeñas/radioterapia , Neoplasias Pulmonares/mortalidad , Neoplasias Pulmonares/radioterapia , Adulto , Anciano , Anciano de 80 o más Años , Carcinoma de Pulmón de Células no Pequeñas/patología , Femenino , Humanos , Neoplasias Pulmonares/patología , Masculino , Persona de Mediana Edad , Estadificación de Neoplasias , Estudios Retrospectivos , Factores de Riesgo , Análisis de Supervivencia
11.
J Laparoendosc Adv Surg Tech A ; 20(4): 379-82, 2010 May.
Artículo en Inglés | MEDLINE | ID: mdl-20210665

RESUMEN

OBJECTIVES: Laparoscopic pyeloplasty and ureteric reimplantation are complex urologic operations requiring delicate surgical skill. The use of a robot may provide benefits in performing these reconstructive operations. In this article, we report our early experience in the use of the robot in pediatric urologic operations. METHODS: Children who underwent robotic-assisted reconstructive urologic operations were reviewed and analyzed. RESULTS: From November 2005 to April 2008, 8 children underwent robotic-assisted reconstructive urologic operations. Three children had extravesical ureteral reimplantation performed for vesicoureteric reflux (VUR), and 5 children had pyeloplasty performed for pelvic-ureteric junction obstruction. There was no conversion to open procedure and no intraoperative complication. The operative time ranged from 105 to 420 minutes (mean, 219). Postoperatively, 1 patient had urinary retention and 1 patient had postoperative fever. Hospital stay ranged from 3 to 10 days (mean, 4.8). Mean follow-up time was 38 months (range, 17-46). VURs were resolved for the 2 children with simple VUR and was downgraded for the child with duplex kidney. All patients who underwent pyeloplasty showed satisfactory urinary drainage after the operation. CONCLUSIONS: From this early experience, robotic-assisted urologic operations in children were safe and feasible. It was particularly useful in reconstructive operations that required precise suturing, such as ureteric reimplantation and pyeloplasty.


Asunto(s)
Laparoscopía , Robótica , Obstrucción Ureteral/cirugía , Reflujo Vesicoureteral/cirugía , Niño , Preescolar , Estudios de Cohortes , Femenino , Humanos , Lactante , Pelvis Renal/cirugía , Tiempo de Internación , Masculino , Estudios Retrospectivos , Resultado del Tratamiento , Obstrucción Ureteral/etiología , Obstrucción Ureteral/patología , Reflujo Vesicoureteral/etiología , Reflujo Vesicoureteral/patología
12.
Blood ; 113(3): 646-8, 2009 Jan 15.
Artículo en Inglés | MEDLINE | ID: mdl-18927438

RESUMEN

Children with Down syndrome (DS) have a greatly increased risk of acute megakaryoblastic leukemia (AMKL) and acute lymphoblastic leukemia (ALL). Both DS-AMKL and the related transient myeloproliferative disorder (TMD) have GATA1 mutations as obligatory, early events. To identify mutations contributing to leukemogenesis in DS-ALL, we undertook sequencing of candidate genes, including FLT3, RAS, PTPN11, BRAF, and JAK2. Sequencing of the JAK2 pseudokinase domain identified a specific, acquired mutation, JAK2R683, in 12 (28%) of 42 DS-ALL cases. Functional studies of the common JAK2R683G mutation in murine Ba/F3 cells showed growth factor independence and constitutive activation of the JAK/STAT signaling pathway. High-resolution SNP array analysis of 9 DS-ALL cases identified additional submicroscopic deletions in key genes, including ETV6, CDKN2A, and PAX5. These results infer a complex molecular pathogenesis for DS-ALL leukemogenesis, with trisomy 21 as an initiating or first hit and with chromosome aneuploidy, gene deletions, and activating JAK2 mutations as complementary genetic events.


Asunto(s)
Síndrome de Down/genética , Janus Quinasa 2/genética , Leucemia-Linfoma Linfoblástico de Células Precursoras/genética , Animales , Secuencia de Bases , Análisis Mutacional de ADN , Síndrome de Down/complicaciones , Eliminación de Gen , Humanos , Ratones , Mutación , Reacción en Cadena de la Polimerasa , Polimorfismo de Nucleótido Simple
13.
J Bone Joint Surg Br ; 87(3): 361-6, 2005 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-15773647

RESUMEN

Death during the first year after hip fracture may be influenced by the type of hospital in which patients are treated as well as the time spent awaiting surgery. We studied 57,315 hip fracture patients who were admitted to hospital in Ontario, Canada. Patients treated in teaching hospitals had a decreased risk of in-hospital mortality (odds ratio (OR) 0.89; 95% confidence interval (CI) 0.83 to 0.97) compared with those treated in urban community institutions. There was a trend toward increased mortality in rural rather than urban community hospitals. In-hospital mortality increased as the surgical delay increased (OR 1.13; 95% CI 1.10 to 1.16) for a one-day delay and higher (OR 1.60; 95% CI 1.42 to 1.80) for delays of more than two days. This relationship was strongest for patients younger than 70 years of age and with no comorbidities but was independent of hospital status. Similar relationships were seen at three months and one year after surgery. This suggests that any delay to surgery for non-medical reasons is detrimental to a patient's outcome.


Asunto(s)
Fracturas de Cadera/mortalidad , Hospitales Comunitarios/estadística & datos numéricos , Hospitales de Enseñanza/estadística & datos numéricos , Anciano , Femenino , Fracturas de Cadera/cirugía , Humanos , Tiempo de Internación , Masculino , Persona de Mediana Edad , Ontario/epidemiología , Pronóstico , Análisis de Regresión , Salud Rural , Factores de Tiempo , Salud Urbana
14.
Br J Cancer ; 92(5): 961-6, 2005 Mar 14.
Artículo en Inglés | MEDLINE | ID: mdl-15714210

RESUMEN

We compared the long-term impact of 1- and 2-year screening mammography intervals using prognostic, screening, and outcome information for women aged 50-74 years obtained from the Screening Mammography Program of British Columbia in two time periods, prior to 1997 (policy of annual mammography) and after 1997 (biennial mammography). Survival was estimated for both periods using a prognostic model and the expected rate of interval and screen-detected cancers. The likelihood of a screen-detected cancer with annual screening was 2.32 per thousand screens and with biennial screening was 3.32 per thousand screens. The prognostic profile of screen-detected cancers was better than that of interval cancers. Among both screen-detected and interval cancers, the prognostic profiles with annual and biennial screening were similar. The estimated breast cancer-specific survival rates for women undergoing annual and biennial screening mammography were 95.2 and 94.6% at 5 years, and 90.4 and 89.2% at 10 years, respectively. Annual compared to biennial mammography was associated with a 1.2% increase in the estimated 10-year breast cancer-specific survival for women aged 50-74 years, diagnosed with invasive breast cancer after screening programme attendance.


Asunto(s)
Neoplasias de la Mama/epidemiología , Mamografía/estadística & datos numéricos , Anciano , Neoplasias de la Mama/diagnóstico por imagen , Neoplasias de la Mama/mortalidad , Neoplasias de la Mama/patología , Femenino , Humanos , Persona de Mediana Edad , Estudios Retrospectivos , Tasa de Supervivencia , Factores de Tiempo
15.
J Bone Joint Surg Br ; 85(7): 1045-50, 2003 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-14516044

RESUMEN

The management of spinal metastases is palliative and aimed at improving quality of life at an acceptable risk. This population study uses administrative databases and measures survivorship and complication rates after surgery for spinal metastases. The effects of various potential predictor variables were evaluated. We identified 987 patients with a median survival for all types of cancer of 227 days. The one and three-month mortality was 9% and 29%, respectively. Increasing age, male gender and primary lung cancer were significant risk factors for death within 30 days of surgery. A preoperative neurological deficit contributed a 19% increase in mortality and a 71% increase in the risk of postoperative wound infection. We found an overall major complication rate of 27%. This information will provide patients, families and clinicians with objective data which will help in the choice of treatment and the understanding of the surgical risk and outcome.


Asunto(s)
Neoplasias de la Columna Vertebral/secundario , Neoplasias de la Columna Vertebral/cirugía , Adulto , Factores de Edad , Anciano , Femenino , Humanos , Masculino , Persona de Mediana Edad , Enfermedades del Sistema Nervioso/complicaciones , Ontario/epidemiología , Cuidados Paliativos , Complicaciones Posoperatorias/epidemiología , Factores de Riesgo , Factores Sexuales , Neoplasias de la Columna Vertebral/mortalidad , Análisis de Supervivencia , Tasa de Supervivencia , Resultado del Tratamiento
16.
Breast Cancer Res Treat ; 65(3): 233-40, 2001 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-11336245

RESUMEN

To assess the costs of treating patients with incurable breast cancer, all health system costs during the interval from diagnosis of first recurrence or metastasis until death for 75 female subjects randomly selected from those known to have died of breast cancer in British Columbia, Canada between July 1, 1995 and December 31, 1996, were identified. Costs were determined from several databases within the British Columbia (BC) Ministry of Health, as well as from BC Cancer Agency patient charts. The mean total cost to the health system was CDN $36,474.33 (95% confidence interval $29,752-$43,196) per subject. The mean costs were highest for the youngest age group and lowest for the middle age group, but these only differed by $2,300. Inpatient costs accounted for the greatest proportion of the total, over 50% in all age groups. This data may be valuable in assessing the cost-effectiveness of interventions that are known to affect mortality due to breast cancer.


Asunto(s)
Neoplasias de la Mama/economía , Costos de la Atención en Salud/estadística & datos numéricos , Adulto , Factores de Edad , Anciano , Neoplasias de la Mama/terapia , Femenino , Hospitalización/economía , Humanos , Persona de Mediana Edad , Mortalidad , Metástasis de la Neoplasia
17.
Clin Orthop Relat Res ; (393): 279-86, 2001 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-11764360

RESUMEN

Pathologic fractures of the proximal femur secondary to benign bone tumors often are difficult to treat because of specific anatomic features of this region and the aggressiveness of the tumors. Between 1986 and 1996, 11 patients presented with a pathologic fracture of the proximal femur secondary to a benign bone tumor. All were treated with a uniform approach consisting of biopsy, intralesional curettage, high-speed burring, and reconstruction using morselized allograft, autograft, and a fixed-angle implant. The average followup was 4 years 3 months (range, 24-114 months). One patient was lost to followup. All fractures healed, and there were no local recurrences and no cases of avascular necrosis. Functional evaluation revealed generally good results. Patients scored a mean of 32.6 on the original Musculoskeletal Tumor Society scale and 95.8 on the revised version. The average Toronto Extremity Salvage Score was 91.3. With the numbers available, there were no significant differences between the study group and population norms in the Short Form-36. These results suggest that a uniform approach based on preservation of the femoral head can be applied successfully to the treatment of these lesions with good local tumor control, fracture healing, and acceptable functional outcomes.


Asunto(s)
Neoplasias Óseas/complicaciones , Fracturas del Fémur/etiología , Fracturas por Estrés/etiología , Fracturas por Estrés/cirugía , Adolescente , Adulto , Femenino , Indicadores de Salud , Humanos , Masculino , Estudios Retrospectivos , Resultado del Tratamiento
18.
J Pediatr Orthop ; 20(6): 765-70, 2000.
Artículo en Inglés | MEDLINE | ID: mdl-11097251

RESUMEN

The purpose of this study was to develop a valid and reliable questionnaire to assess physical disability related to the spine in children with spina bifida and scoliosis and their families. Eighty-eight items were generated from a review of the literature and interviews with clinicians, parents, and children with spina bifida and scoliosis. Items were reviewed by 40 children and ranked. After eliminating redundant items, the top 25 items were formatted into a self-administered questionnaire. The questionnaire, completed 2 weeks apart, demonstrated "excellent" test-retest reliability (intraclass correlation coefficient = 0.88). Construct validity was established by high correlation with a validated scale of overall disability: the Activities Scale for Kids (r = 0.86, p < 0.01) and by correlations with global assessment of function. In conclusion, the Spina Bifida Spine Questionnaire is a valid and reliable questionnaire and can be used to assess the outcomes of treatment for children with spina bifida and scoliosis.


Asunto(s)
Evaluación de la Discapacidad , Escoliosis/fisiopatología , Espina Bífida Quística/fisiopatología , Encuestas y Cuestionarios , Adolescente , Niño , Humanos , Proyectos Piloto , Reproducibilidad de los Resultados , Resultado del Tratamiento
19.
Spine (Phila Pa 1976) ; 19(18): 2033-7, 1994 Sep 15.
Artículo en Inglés | MEDLINE | ID: mdl-7825041

RESUMEN

STUDY DESIGN: The incidence of two common discharge recommendations, return to work unrestricted (RTWU) and restricted (RTWR) suggested that most restrictions were applied on the basis of patients' subjective reports of pain or therapists' unfounded fears that return to full duty would result in physical harm. OBJECTIVES: This prospective study compares the therapist's return to work recommendation to the patient's actual work status and analyzes the effect of that recommendation on outcome. METHODS: There were 1438 consecutive patients reviewed by structured telephone interviews during the two halves of the study: the control group when pain was accepted as a reason for restriction and the study group when it was not. SUMMARY OF BACKGROUND DATA: In the control group, 44% of the patients were recommended to RTWU; for the study group, 81% received this recommendation. Compliance was 84% for the control subjects and 78% for the study group. RESULTS: The absolute number of patients who returned to unrestricted work doubled in the study group. CONCLUSIONS: The probability of a successful return to normal duty increased with a recommendation of RTWU (P = 0.0001), whereas the probability of failure increased when restrictions were imposed (P = 0.0001).


Asunto(s)
Traumatismos de la Espalda , Dolor de la Región Lumbar/rehabilitación , Enfermedades Profesionales/rehabilitación , Modalidades de Fisioterapia , Evaluación de Capacidad de Trabajo , Trabajo , Indemnización para Trabajadores , Adulto , Estudios de Cohortes , Femenino , Humanos , Dolor de la Región Lumbar/epidemiología , Masculino , Enfermedades Profesionales/epidemiología , Ontario/epidemiología , Cooperación del Paciente , Estudios Prospectivos , Resultado del Tratamiento
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