Toronto Sunnybrook Regional Cancer Center

Toronto, Canada

Toronto Sunnybrook Regional Cancer Center

Toronto, Canada
SEARCH FILTERS
Time filter
Source Type

Van Poppel H.,Catholic University of Leuven | Da Pozzo L.,Instituto Scientifico Hs Raffaele | Albrecht W.,Krankenanstalt Rudolfstiftung | Matveev V.,Cancer Research Center | And 8 more authors.
European Urology | Year: 2011

Background: Nephron-sparing surgery (NSS) can safely be performed with slightly higher complication rates than radical nephrectomy (RN), but proof of oncologic effectiveness is lacking. Objective: To compare overall survival (OS) and time to progression. Design, setting, and participants: From March 1992 to January 2003, when the study was prematurely closed because of poor accrual, 541 patients with small (≤5 cm), solitary, T1-T2 N0 M0 (Union Internationale Contre le Cancer [UICC] 1978) tumours suspicious for renal cell carcinoma (RCC) and a normal contralateral kidney were randomised to NSS or RN in European Organisation for Research and Treatment of Cancer Genito-Urinary Group (EORTC-GU) noninferiority phase 3 trial 30904. Intervention: Patients were randomised to NSS (n = 268) or RN (n = 273) together with limited lymph node dissection (LND). Measurements: Time to event end points was compared with log-rank test results. Results and limitations: Median follow-up was 9.3 yr. The intention-to-treat (ITT) analysis showed 10-yr OS rates of 81.1% for RN and 75.7% for NSS. With a hazard ratio (HR) of 1.50 (95% confidence interval [CI], 1.03-2.16), the test for noninferiority is not significant (p = 0.77), and test for superiority is significant (p = 0.03). In RCC patients and clinically and pathologically eligible patients, the difference is less pronounced (HR = 1.43 and HR = 1.34, respectively), and the superiority test is no longer significant (p = 0.07 and p = 0.17, respectively). Only 12 of 117 deaths were the result of renal cancer (four RN and eight NSS). Twenty-one patients progressed (9 after RN and 12 after NSS). Quality of life and renal function outcomes have not been addressed. Conclusions: Both methods provide excellent oncologic results. In the ITT population, NSS seems to be significantly less effective than RN in terms of OS. However, in the targeted population of RCC patients, the trend in favour of RN is no longer significant. The small number of progressions and deaths from renal cancer cannot explain any possible OS differences between treatment types. © 2010 European Association of Urology. Published by Elsevier B.V. All rights reserved.


Metcalfe K.,University of Toronto | Metcalfe K.,Womens College Research Institute | Gershman S.,University of Toronto | Gershman S.,Womens College Research Institute | And 11 more authors.
British Journal of Cancer | Year: 2011

Purpose:The objective of this study was to estimate the risk of contralateral breast cancer in BRCA1 and BRCA2 carriers; and measure the extent to which host, family history, and cancer treatment-related factors modify the risk.Patients and methods:Patients were 810 women, with stage I or II breast cancer, for whom a BRCA1 or BRCA2 mutation had been identified in the family. Patients were followed from the initial diagnosis of cancer until contralateral mastectomy, contralateral breast cancer, death, or last follow-up.Results: Overall, 149 subjects (18.4%) developed a contralateral breast cancer. The 15-year actuarial risk of contralateral breast cancer was 36.1% for women with a BRCA1 mutation and was 28.5% for women with a BRCA2 mutation. Women younger than 50 years of age at the time of breast cancer diagnosis were significantly more likely to develop a contralateral breast cancer at 15 years, compared with those older than 50 years (37.6 vs 16.8%; P0.003). Women aged 50 years with two or more first-degree relatives with early-onset breast cancer were at high risk of contralateral breast cancer, compared with women with fewer, or no first-degree relatives with breast cancer (50 vs 36%; P0.005). The risk of contralateral breast cancer was reduced with oophorectomy (RR 0.47; 95% CI 0.30-0.76; P0.002).Conclusion:The risk of contralateral breast cancer risk in BRCA mutation carriers declines with the age of diagnosis and increases with the number of first-degree relatives affected with breast cancer. Oophorectomy reduces the risk of contralateral breast cancer in young women with a BRCA mutation. © 2011 Cancer Research UK All rights reserved.


Lawton C.A.,Medical College of Wisconsin | Hunt D.,Statistical Center | Lee W.R.,Duke University | Gomella L.,Thomas Jefferson University | And 5 more authors.
International Journal of Radiation Oncology Biology Physics | Year: 2011

Purpose: To evaluate the long-term effectiveness of transrectal ultrasound-guided permanent radioactive I125 implantation of the prostate for organ confined adenocarcinoma of the prostate compared with historical data of prostatectomy and external beam radiotherapy within a cooperative group setting. Methods and Materials: Patients accrued to this study had histologically confirmed, locally confined adenocarcinoma of the prostate clinical stage T1b, T1c, or T2a; no nodal or metastatic disease; prostate-specific antigen level of ≤10 ng/ml; and a Gleason score of ≤6. All patients underwent transrectal ultrasound-guided radioactive I125 seed implantation into the prostate. The prescribed dose was 145 Gy to the prostate planning target volume. Results: A total of 101 patients from 27 institutions were accrued to this protocol; by design, no single institution accrued more than 8 patients. There were 94 eligible patients. The median follow up was 8.1 years (range, 0.1-9.2 years). After 8 years, 8 patients had protocol-defined biochemical (prostate-specific antigen) failure (cumulative incidence, 8.0%); 5 patients had local failure (cumulative incidence, 5.5%); and 1 patient had distant failure (cumulative incidence, 1.1%; this patient also had biochemical failure and died of causes not related to prostate cancer). The 8-year overall survival rate was 88%. At last follow-up, no patient had died of prostate cancer or related toxicities. Three patients had maximum late toxicities of Grade 3, all of which were genitourinary. No Grade 4 or 5 toxicities were observed. Conclusions: The long-term results of this clinical trial have demonstrated that this kind of trial can be successfully completed through the RTOG and that results in terms of biochemical failure and toxicity compare very favorably with other brachytherapy published series as well as surgical and external beam radiotherapy series. In addition, the prospective, multicenter design highlights the probable generalizability of the outcomes. Copyright © 2011 Elsevier Inc.


Lawton C.A.,Medical College of Wisconsin | Yan Y.,Radiation Therapy Oncology Group Statistical Center | Lee W.R.,Duke University | Gillin M.,University of Houston | And 6 more authors.
International Journal of Radiation Oncology Biology Physics | Year: 2012

Purpose: External-beam radiation therapy combined with low - doserate permanent brachytherapy are commonly used to treat men with localized prostate cancer. This Phase II trial was performed to document late gastrointestinal or genitourinary toxicity as well as biochemical control for this treatment in a multi-institutional cooperative group setting. This report defines the long-term results of this trial. Methods and Materials: All eligible patients received external-beam radiation (45 Gy in 25 fractions) followed 2-6 weeks later by a permanent iodine 125 implant of 108 Gy. Late toxicity was defined by the Radiation Therapy Oncology Group/European Organization for Research and Treatment of Cancer late radiation morbidity scoring scheme. Biochemical control was defined by the American Society for Therapeutic Radiology and Oncology (ASTRO) Consensus definition and the ASTRO Phoenix definition. Results: One hundred thirty-eight patients were enrolled from 20 institutions, and 131 were eligible. Median follow-up (living patients) was 8.2 years (range, 2.7-9.3 years). The 8-year estimate of late grade >3 genitourinary and/or gastrointestinal toxicity was 15%. The most common grade >3 toxicities were urinary frequency, dysuria, and proctitis. There were two grade 4 toxicities, both bladder necrosis, and no grade 5 toxicities. In addition, 42% of patients complained of grade 3 impotence (no erections) at 8 years. The 8-year estimate of biochemical failure was 18% and 21% by the Phoenix and ASTRO consensus definitions, respectively. Conclusion: Biochemical control for this treatment seems durable with 8 years of follow-up and is similar to high - dose external beam radiation alone or brachytherapy alone. Late toxicity in this multi-institutional trial is higher than reports from similar cohorts of patients treated with high - dose external-beam radiation alone or permanent low - doserate brachytherapy alone, perhaps suggesting further attention to strategies that limit doses to normal structures or to unimodal radiotherapy techniques. © 2012 Elsevier Inc.


Michalski J.M.,University of Washington | Yan Y.,Radiation Therapy Oncology Group Statistical Center | Watkins-Bruner D.,Emory University | Bosch W.R.,University of Washington | And 6 more authors.
International Journal of Radiation Oncology Biology Physics | Year: 2013

Purpose To give a preliminary report of clinical and treatment factors associated with toxicity in men receiving high-dose radiation therapy (RT) on a phase 3 dose-escalation trial. Methods and Materials The trial was initiated with 3-dimensional conformal RT (3D-CRT) and amended after 1 year to allow intensity modulated RT (IMRT). Patients treated with 3D-CRT received 55.8 Gy to a planning target volume that included the prostate and seminal vesicles, then 23.4 Gy to prostate only. The IMRT patients were treated to the prostate and proximal seminal vesicles to 79.2 Gy. Common Toxicity Criteria, version 2.0, and Radiation Therapy Oncology Group/European Organization for Research and Treatment of Cancer late morbidity scores were used for acute and late effects. Results Of 763 patients randomized to the 79.2-Gy arm of Radiation Therapy Oncology Group 0126 protocol, 748 were eligible and evaluable: 491 and 257 were treated with 3D-CRT and IMRT, respectively. For both bladder and rectum, the volumes receiving 65, 70, and 75 Gy were significantly lower with IMRT (all P<.0001). For grade (G) 2+ acute gastrointestinal/genitourinary (GI/GU) toxicity, both univariate and multivariate analyses showed a statistically significant decrease in G2+ acute collective GI/GU toxicity for IMRT. There were no significant differences with 3D-CRT or IMRT for acute or late G2+ or 3+ GU toxicities. Univariate analysis showed a statistically significant decrease in late G2+ GI toxicity for IMRT (P=.039). On multivariate analysis, IMRT showed a 26% reduction in G2+ late GI toxicity (P=.099). Acute G2+ toxicity was associated with late G3+ toxicity (P=.005). With dose-volume histogram data in the multivariate analysis, RT modality was not significant, whereas white race (P=.001) and rectal V70 ≥15% were associated with G2+ rectal toxicity (P=.034). Conclusions Intensity modulated RT is associated with a significant reduction in acute G2+ GI/GU toxicity. There is a trend for a clinically meaningful reduction in late G2+ GI toxicity with IMRT. The occurrence of acute GI toxicity and large (>15%) volumes of rectum >70 Gy are associated with late rectal toxicity. © 2013 The Authors. Published by Elsevier Inc. All rights reserved.


Metcalfe K.,University of Toronto | Metcalfe K.,Womens College Research Institute | Gershman S.,University of Toronto | Gershman S.,Womens College Research Institute | And 9 more authors.
BMJ (Online) | Year: 2014

Objective To compare the survival rates of women with BRCA associated breast cancer who did and did not undergo mastectomy of the contralateral breast. Design Retrospective analysis. Setting 12 cancer genetics clinics. Participants 390 women with a family history of stage I or II breast cancer who were carriers of BRCA1 and BRCA2 mutations and initially treated with unilateral or bilateral mastectomy. 181 patients had mastectomy of the contralateral breast. Patients were followed for up to 20 years from diagnosis. Main outcome measure Death from breast cancer. Results 79 women died of breast cancer in the follow-up period (18 in the bilateral mastectomy group and 61 in the unilateral mastectomy group). The median follow-up time was 14.3 years (range 0.1-20.0 years). At 20 years the survival rate for women who had mastectomy of the contralateral breast was 88% (95% confidence interval 83% to 93%) and for those who did not was 66% (59% to 73%). In a multivariable analysis, controlling for age at diagnosis, year of diagnosis, treatment, and other prognostic features, contralateral mastectomy was associated with a 48% reduction in death from breast cancer (hazard ratio 0.52, 95% confidence interval 0.29 to 0.93; P=0.03). In a propensity score adjusted analysis of 79 matched pairs, the association was not significant (0.60, 0.34 to 1.06; P=0.08). Based on these results, we predict that of 100 women treated with contralateral mastectomy, 87 will be alive at 20 years compared with 66 of 100 women treated with unilateral mastectomy. Conclusions This study suggests that women who are positive for BRCA mutations and who are treated for stage I or II breast cancer with bilateral mastectomy are less likely to die from breast cancer than women who are treated with unilateral mastectomy. Given the small number of events in this cohort, further research is required to confirm these findings.


Wong K.K.,University of Toronto | Khatri I.,University of Toronto | Shaha S.,Sunnybrook Research Institute | Spaner D.E.,Sunnybrook Research Institute | And 2 more authors.
Journal of Leukocyte Biology | Year: 2010

CD200 is a transmembrane protein broadly expressed on a variety of cell types, which delivers immunoregulatory signals through binding to receptors (CD200Rs) expressed on monocytes/myeloid cells and T lymphocytes. Signals delivered through the CD200:CD200R axis have been shown to play an important role in the regulation of anti-tumor immunity, and overexpression of CD200 has been reported in a number of malignancies, including CLL, as well as on cancer stem cells. We investigated the effect of CD200 blockade in vitro on a generation of CTL responses against a poorly immunogenic CD200 + lymphoma cell line and fresh cells obtained from CLL patients using anti-CD200 mAb and CD200-specific siRNAs. Suppression of functional expression of CD200 augmented killing of the CD200 + cells, as well as production of the inflammatory cytokines IFN-γ and TNF-α by effector PBMCs. Killing was mediated by CD8 + cytotoxic T cells, and CD4 + T cells play an important role in CD200-mediated suppression of CTL responses. Our data suggest that CD200 blockade may represent a novel approach to clinical treatment of CLL. © Society for Leukocyte Biology.


Fitch M.I.,Toronto Sunnybrook Regional Cancer Center | Steele R.,Toronto Sunnybrook Regional Cancer Center
Canadian oncology nursing journal = Revue canadienne de nursing oncologique | Year: 2010

The main purpose of this study was to identify the range of supportive care needs of patients diagnosed with lung cancer who attended an outpatient, regional cancer centre. Lung cancer has more than a physical impact on those who are diagnosed with the disease, yet relatively little has been reported on their needs beyond those for physical symptom management. A total of 88 patients participated in this study by completing a self-report questionnaire. The data provided clear indication that a range of needs, both physical and psychosocial, exist for this group of patients and, furthermore, remain unmet. Lack of energy, pain, and concern about those close to them were reported most frequently. Patients also expressed distress because of difficulty managing their needs and many indicated wanting help to cope with the challenges they were experiencing. However, a sizeable proportion (45% to 58%) indicated they did not want help from staff at the cancer centre for some need items despite considerable distress arising from those remaining unmet (e.g., lack of energy, fears about cancer spreading, not being able to do the things you used to do). Suggestions for practice and future research are offered to improve the care for this group of patients.


PubMed | Toronto Sunnybrook Regional Cancer Center
Type: Journal Article | Journal: Seminars in oncology | Year: 2017

Advanced-stage mantle cell lymphoma (MCL) is a disease for which no curative treatment strategy exists. Results with standard combination chemotherapy, with or without an anthracycline, are disappointing, and new and better therapies are needed. High-dose therapy and autologous stem-cell transplantation (ASCT) have been performed in patients with MCL both up front and at relapse with varying degrees of success. Rituximab (Rituxan; Genentech, Inc, South San Francisco, CA, and IDEC Pharmaceuticals, San Diego, CA) has shown moderate response rates in patients with MCL. It has also been used safely and effectively as an in vivo purge during ASCT for patients with lymphoma. We are currently investigating an aggressive protocol in patients with newly diagnosed, untreated MCL using a combination of two promising therapeutic modalities, high-dose therapy-ASCT and rituximab. Since 1999, 13 patients with newly diagnosed MCL have been enrolled in this phase II clinical trial. CHOP (cyclophosphamide/prednisone/vincristine/doxorubicin) is used as debulking chemotherapy. Stem cells are mobilized with 5 days of granulocyte colony-stimulating factor 10 g/kg/d, with a single infusion of rituximab 375 mg/m


PubMed | Toronto Sunnybrook Regional Cancer Center
Type: | Journal: Seminars in oncology | Year: 2017

Patients with mantle cell lymphoma (MCL) have a particularly poor prognosis when treated with standard chemotherapy, with a median overall survival of only 3 years. These patients have therefore been considered for first-line treatment with more aggressive or experimental strategies, such as high-dose therapy (HDT) with autologous stem cell transplantation (ASCT). While high rates of clinical remission have been achieved with HDT/ASCT, this procedure alone is not believed to be curative and different treatment strategies are being developed to improve outcomes in this group of patients. Single-agent rituximab is active in both newly diagnosed and relapsed MCL and therefore the addition of rituximab to chemotherapy regimens and/or HDT/ASCT may enhance their efficacy. Outside the transplantation setting, rituximab plus chemotherapy has been shown to be highly active in MCL, and preliminary data from randomized trials suggest that the combination may yield superior results compared with chemotherapy alone. The addition of rituximab to transplantation protocols appears to be a very promising strategy for patients with MCL, given as an in vivo purge before HDT/ASCT and/or as posttransplant maintenance therapy. Two phase II clinical trials with rituximab given as an in vivo purge during stem cell mobilization and as posttransplant immunotherapy in patients with previously untreated MCL have generated very promising data. Rituximab is an important addition to cytotoxic therapy and with HDT/ASCT represents a highly active therapy that may be superior to conventional treatment or HDT/ASCT alone in MCL. Randomized prospective studies and longer follow-up are needed to determine whether these regimens can achieve longer survival or possibly cure in this disease.

Loading Toronto Sunnybrook Regional Cancer Center collaborators
Loading Toronto Sunnybrook Regional Cancer Center collaborators