Butts C.,11560 University Avenue |
Maksymiuk A.,Cancercare Manitoba |
Goss G.,Cancer Center |
Soulieres D.,University of Montreal |
And 8 more authors.
Journal of Cancer Research and Clinical Oncology
Purpose: To present an updated survival analysis of an open-label, parallel-group, phase IIB trial of BLP25 liposome vaccine (L-BLP25) in patients with stage IIIB or IV non-small-cell lung cancer (NSCLC). Methods: Patients were randomized to either L-BLP25 plus best supportive care (BSC) or BSC alone. Patients in the L-BLP25 arm received subcutaneous vaccinations of L-BLP25 930 μg weekly for 8 weeks, followed by maintenance vaccinations at 6-week intervals. Results: Median survival time was 4.2 months longer in patients receiving L-BLP25 plus BSC (n = 88) than in those receiving BSC alone (n = 83; 17.2 months vs. 13.0 months, respectively; hazard ratio [HR] 0.745, 95% confidence interval [CI] 0.533-1.042). The 3-year survival rate was 31% in patients receiving L-BLP25 plus BSC and 17% in those receiving BSC (P = 0.035). In the stratified subset of patients with stage IIIB loco-regional (LR) disease, median survival time was 17.3 months longer in patients receiving L-BLP25 plus BSC (n = 35) than in those receiving BSC (n = 30; 30.6 months vs. 13.3 months, respectively; HR 0.548, 95% CI 0.301-0.999). In this subgroup, 3-year survival was 49% in patients receiving L-BLP25 plus BSC and 27% in those receiving BSC (P = 0.070). Conclusions: Confirming the initial results, further followup continues to show that survival time for patients with stage IIIB/IV NSCLC was longer with L-BLP25 plus BSC compared with BSC alone, with the greatest difference seen in patients with stage IIIB LR disease. © Springer-Verlag 2011. Source
Schellenberg D.,Fraser Valley Cancer Center |
Quon A.,Stanford University |
Minn A.Y.,Stanford University |
Graves E.E.,Stanford University |
And 6 more authors.
International Journal of Radiation Oncology Biology Physics
Purpose: This study analyzed the prognostic value of positron emission tomography (PET) for locally advanced pancreas cancer patients undergoing stereotactic body radiotherapy (SBRT). Patients and Methods: Fifty-five previously untreated, unresectable pancreas cancer patients received a single fraction of 25-Gy SBRT sequentially with gemcitabine-based chemotherapy. On the preradiation PET-CT, the tumor was contoured and the maximum standardized uptake value (SUVmax) and metabolic tumor burden (MTB) were calculated using an in-house software application. High-SUVmax and low-SUVmax subgroups were created by categorizing patients above or below the median SUVmax. The analysis was repeated to form high-MTB and low-MTB subgroups as well as clinically relevant subgroups with SUVmax values of <5, 5-10, or >10. Multivariate analysis analyzing SUVmax, MTB, age, chemotherapy cycles, and pretreatment carbohydrate antigen (CA)19-9 was performed. Results: For the entire population, median survival was 12.7 months. Median survival was 9.8 vs.15.3 months for the high- and low- SUVmax subgroups (p <0.01). Similarly, median survival was 10.1 vs. 18.0 months for the high MTB and low MTB subgroups (p <0.01). When clinical SUVmax cutoffs were used, median survival was 6.4 months in those with SUVmax >10, 9.5 months with SUVmax 5.0-10.0, and 17.7 months in those with SUVmax <5 (p <0.01). On multivariate analysis, clinical SUVmax was an independent predictor for overall survival (p = 0.03) and progression-free survival (p = 0.03). Conclusion: PET scan parameters can predict for length of survival in locally advanced pancreas cancer patients. Copyright © 2010 Elsevier Inc. Source
Incorporating quantitative single photon emission computed tomography into radiation therapy treatment planning for lung cancer: Impact of attenuation and scatter correction on the single photon emission computed tomography-weighted mean dose and functional lung segmentation
Yin L.,Vancouver Cancer Center |
Yin L.,University of British Columbia |
Shcherbinin S.,University of British Columbia |
Celler A.,University of British Columbia |
And 12 more authors.
International Journal of Radiation Oncology Biology Physics
Purpose: To assess the impact of attenuation and scatter corrections on the calculation of single photon emission computed tomography (SPECT)-weighted mean dose (SWMD) and functional volume segmentation as applied to radiation therapy treatment planning for lung cancer. Methods and Materials: Nine patients with lung cancer underwent a SPECT lung perfusion scan. For each scan, four image sets were reconstructed using the ordered subsets expectation maximization method with attenuation and scatter corrections ranging from none to a most comprehensive combination of attenuation corrections and direct scatter modeling. Functional volumes were segmented in each reconstructed image using 10%, 20%, .., 90% of maximum SPECT intensity as a threshold. Systematic effects of SPECT reconstruction methods on treatment planning using functional volume were studied by calculating size and spatial agreements of functional volumes, and V20 for functional volume from actual treatment plans. The SWMD was calculated for radiation beams with a variety of possible gantry angles and field sizes. Results: Functional volume segmentation is sensitive to the particular method of SPECT reconstruction used. Large variations in functional volumes, as high as >50%, were observed in SPECT images reconstructed with different attenuation/scatter corrections. However, SWMD was less sensitive to the type of scatter corrections. SWMD was consistent within 2% for all reconstructions as long as computed tomography-based attenuation correction was used. Conclusion: When using perfusion SPECT images during treatment planning optimization/evaluation, the SWMD may be the preferred figure of merit, as it is less affected by reconstruction technique, compared with threshold-based functional volume segmentation. Copyright © 2010 Elsevier Inc. Printed in the USA. All rights reserved. Source
Mason M.D.,University of Cardiff |
Parulekar W.R.,Queens University |
Sydes M.R.,University College London |
Kirkbride P.,Clatterbridge Cancer Center |
And 18 more authors.
Journal of Clinical Oncology
Purpose: We have previously reported that radiotherapy (RT) added to androgen-deprivation therapy (ADT) improves survival in men with locally advanced prostate cancer. Here, we report the prespecified final analysis of this randomized trial. Patients and Methods: NCIC Clinical Trials Group PR.3/Medical Research Council PR07/Intergroup T94-0110 was a randomized controlled trial of patients with locally advanced prostate cancer. Patients with T3-4, N0/Nx, M0 prostate cancer or T1-2 disease with either prostate-specific antigen (PSA) of more than 40 μg/L or PSA of 20 to 40 μg/L plus Gleason score of 8 to 10 were randomly assigned to lifelong ADT alone or to ADT+RT. The RT dose was 64 to 69 Gy in 35 to 39 fractions to the prostate and pelvis or prostate alone. Overall survival was compared using a log-rank test stratified for prespecified variables. Results: One thousand two hundred five patients were randomly assigned between 1995 and 2005, 602 to ADT alone and 603 to ADT+RT. At a median follow-up time of 8 years, 465 patients had died, including 199 patients from prostate cancer. Overall survival was significantly improved in the patients allocated to ADT+RT (hazard ratio [HR], 0.70; 95% CI, 0.57 to 0.85; P < .001). Deaths from prostate cancer were significantly reduced by the addition of RT to ADT (HR, 0.46; 95% CI, 0.34 to 0.61; P < .001). Patients on ADT+RT reported a higher frequency of adverse events related to bowel toxicity, but only two of 589 patients had grade 3 or greater diarrhea at 24 months after RT. Conclusion: This analysis demonstrates that the previously reported benefit in survival is maintained at a median follow-up of 8 years and firmly establishes the role of RT in the treatment of men with locally advanced prostate cancer. © 2015 American Society of Clinical Oncology. Source
Kennecke H.,BC Cancer Agency |
Lim H.,BC Cancer Agency |
Woods R.,BC Cancer Agency |
McGahan C.E.,BC Cancer Agency |
And 3 more authors.
Radiotherapy and Oncology
Background and purpose: This study compares the outcomes of patients with pathological (p) T3N0 rectal cancer treated with surgery alone (S), surgery and radiation (SR) or surgery, radiation and chemotherapy (SRC), in a population based setting. Materials: Three hundred and seven patients with operable, macroscopically resected pT3N0 rectal cancer referred to the BC Cancer Agency between 2000 and 2004 were segregated by treatment type: S (n = 65), SR (n = 97) and SRC (n = 145). Patient characteristics, 5-year locoregional recurrence (LRR) and disease-specific survival (DSS) were compared between treatment cohorts. Results: Median age differed significantly between S, SR and SRC patient cohorts: 76, 72 and 64 years respectively. Five-year LRR differed by treatment group, with 29% for S, 6.3% for SR and 3.84% for SRC patients. DSS was superior in SRC compared to S patients (hazard ratio = 0.31 [0.17, 0.60]). Co-morbidities and patient preference were most common reasons for omission of radiation. Conclusions: Unselected patients with pT3N0 rectal cancer not treated with peri-operative radiation experience a high rate of LRR and reduced DSS in comparison to patients treated with bimodality and trimodality therapies. Advanced age is significantly associated with omission of therapy in patients with early stage rectal cancer. © 2012 Elsevier Ireland Ltd. All rights reserved. Source