Front Matter - Journal of Clinical Oncology
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Front Matter - Journal of Clinical Oncology
JOURNAL of CLINICAL ONCOLOGY ................................................................................... Official Journal of the American Society of Clinical Oncology Journal of Clinical Oncology (ISSN 0732–183X) is published 36 times a year, three times monthly, by the American Society of Clinical Oncology, 2318 Mill Road, Suite 800, Alexandria, VA 22314. Periodicals postage is paid at Alexandria, VA, and at additional mailing offices. Postmaster Send all changes of address for Journal of Clinical Oncology subscribers to: JCO Customer Service 2318 Mill Road, Suite 800 Alexandria, VA 22314 Editorial Correspondence (manuscript-related inquiries): Stephen A. 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Copyright Copyright © 2014 by American Society of Clinical Oncology unless otherwise indicated. All rights reserved. No part of this publication may be reproduced or transmitted in any form or by any means now or hereafter known, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the Publisher. Printed in the United States of America. The appearance of the code at the bottom of the left column of the first page of an article in this journal indicates the copyright owner’s consent that copies of the article may be made for personal or internal use, or for the personal or internal use of specific clients, for those registered with the Copyright Clearance Center, Inc. (222 Rosewood Drive, Danvers, MA 01923; 978-750-8400; www.copyright.com). This consent is given on the condition that the copier pay the stated per-copy fee for that article through the Copyright Clearance Center, Inc., for copying beyond that permitted by Sections 107 or 108 of the US Copyright Law. This consent does not extend to other kinds of copying, such as copying for general distribution, for advertising or promotional purposes, for creating new collective works, or for resale. Absence of the code indicates that the material may not be processed through the Copyright Clearance Center, Inc. CPT © is a trademark of the American Medical Association. Journal of Clinical Oncology® is a registered trademark of American Society of Clinical Oncology, Inc. Volume 32, Issue 34 December 1, 2014 Current Abstracts ................................................................................................................................................................................................ Long-Term Outcomes in Patients With Muscle-Invasive Bladder Cancer After Selective Bladder-Preserving Combined-Modality Therapy: A Pooled Analysis of Radiation Therapy Oncology Group Protocols 8802, 8903, 9506, 9706, 9906, and 0233 Raymond H. Mak, Daniel Hunt, William U. Shipley, et al pp 3801-3809 Purpose: Multiple prospective Radiation Therapy Oncology Group (RTOG) protocols have evaluated bladder-preserving combinedmodality therapy (CMT) for muscle-invasive bladder cancer (MIBC), reserving cystectomy for salvage treatment. We performed a pooled analysis of long-term outcomes in patients with MIBC enrolled across multiple studies. Patients and Methods: Four hundred sixty-eight patients with MIBC were enrolled onto six RTOG bladder-preservation studies, including five phase II studies (RTOG 8802, 9506, 9706, 9906, and 0233) and one phase III study (RTOG 8903). Overall survival (OS) was estimated using the Kaplan-Meier method, and diseasespecific survival (DSS), muscle-invasive and non–muscle-invasive local failure (LF), and distant metastasis (DM) were estimated by the cumulative incidence method. Results: The median age of patients was 66 years (range, 34 to 93 years), and clinical T stage was T2 in 61%, T3 in 35%, and T4a in 4% of patients. Complete response to CMT was documented in 69% of patients. With a median follow-up of 4.3 years among all patients and 7.8 years among survivors (n ⫽ 205), the 5- and 10year OS rates were 57% and 36%, respectively, and the 5- and 10-year DSS rates were 71% and 65%, respectively. The 5- and 10-year estimates of muscle-invasive LF, non–muscle-invasive LF, and DM were 13% and 14%, 31% and 36%, and 31% and 35%, respectively. Conclusion: This pooled analysis of multicenter, prospective RTOG bladder-preserving CMT protocols demonstrates long-term DSS comparable to modern immediate cystectomy studies, for patients with similarly staged MIBC. Given the low incidence of late recurrences with long-term follow-up, CMT can be considered as an alternative to radical cystectomy, especially in elderly patients not well suited for surgery. J Clin Oncol 32:3801-3809 © 2014 by American Society of Clinical Oncology ■ ■ ■ continued Volume 32, Issue 34 December 1, 2014 Current Abstracts ................................................................................................................................................................................................ Preservation of Memory With Conformal Avoidance of the Hippocampal Neural Stem-Cell Compartment During Whole-Brain Radiotherapy for Brain Metastases (RTOG 0933): A Phase II Multi-Institutional Trial Vinai Gondi, Stephanie L. Pugh, Wolfgang A. Tome, et al pp 3810-3816 Purpose: Hippocampal neural stem-cell injury during whole-brain radiotherapy (WBRT) may play a role in memory decline. Intensity-modulated radiotherapy can be used to avoid conformally the hippocampal neural stem-cell compartment during WBRT (HA-WBRT). RTOG 0933 was a single-arm phase II study of HA-WBRT for brain metastases with prespecified comparison with a historical control of patients treated with WBRT without hippocampal avoidance. Patients and Methods: Eligible adult patients with brain metastases received HA-WBRT to 30 Gy in 10 fractions. Standardized cognitive function and quality-of-life (QOL) assessments were performed at baseline and 2, 4, and 6 months. The primary end point was the Hopkins Verbal Learning Test–Revised Delayed Recall (HVLT-R DR) at 4 months. The historical control demonstrated a 30% mean relative decline in HVLT-R DR from baseline to 4 months. To detect a mean relative decline ⱕ 15% in HVLT-R DR after HA-WBRT, 51 analyzable patients were required to ensure 80% statistical power with ␣ ⫽ 0.05. Results: Of 113 patients accrued from March 2011 through November 2012, 42 patients were analyzable at 4 months. Mean relative decline in HVLT-R DR from baseline to 4 months was 7.0% (95% CI, ⫺4.7% to 18.7%), significantly lower in comparison with the historical control (P ⬍ .001). No decline in QOL scores was observed. Two grade 3 toxicities and no grade 4 to 5 toxicities were reported. Median survival was 6.8 months. Conclusion: Conformal avoidance of the hippocampus during WBRT is associated with preservation of memory and QOL as compared with historical series. J Clin Oncol 32:3810-3816 © 2014 by American Society of Clinical Oncology ■ ■ ■ continued Volume 32, Issue 34 December 1, 2014 Current Abstracts ................................................................................................................................................................................................ Surveillance for Stage I Nonseminoma Testicular Cancer: Outcomes and Long-Term Follow-Up in a Population-Based Cohort Gedske Daugaard, Maria Gry Gundgaard, Mette Saksø Mortensen, et al pp 3817-3823 Purpose: To describe treatment results in a large cohort with stage I nonseminoma germ cell cancer (NSGCC) treated in a surveillance program. Patients and Methods: From January 1, 1984, to December 31, 2007, 1,226 patients with stage I NSGCC, including high-risk patients with vascular invasion, were observed in a surveillance program. Results: The relapse rate after orchiectomy alone was 30.6% at 5 years. Presence of vascular invasion together with embryonal carcinoma and rete testis invasion in the testicular primary identified a group with a relapse risk of 50%. Without risk factors, the relapse risk was 12%. Eighty percent of relapses were diagnosed within the first year after orchiectomy. The median time to relapse was 5 months (range, 1 to 308 months). Early relapses were mainly detected by increase in tumor markers, and late relapses were detected by computed tomography scans. Relapses after 5 years were seen in 0.5% of the whole cohort or in 1.6% of relapsing patients. The majority of relapses (94.4%) belonged to the good prognostic group according to the International Germ Cell Cancer Collaborative Group classification. The disease-specific survival at 15 years was 99.1%. Conclusion: A surveillance policy for patients with stage I NSGCC is a safe approach associated with an excellent cure rate and an overall low treatment burden despite a high relapse rate in a small group of patients. We recommend surveillance for patients with stage I NSGCC with immediate systemic treatment at relapse. Clearly defined risk factors for relapse are presented if an option of risk-adapted treatment is preferred. J Clin Oncol 32:3817-3823 © 2014 by American Society of Clinical Oncology ■ ■ ■ continued Volume 32, Issue 34 December 1, 2014 Current Abstracts ................................................................................................................................................................................................ Phase II Trial of Stereotactic Body Radiation Therapy Combined With Erlotinib for Patients With Limited but Progressive Metastatic Non–Small-Cell Lung Cancer Puneeth Iyengar, Brian D. Kavanagh, Zabi Wardak, et al pp 3824-3830 Purpose: Patients with stage IV non–small-cell lung cancer (NSCLC) who progress through first-line therapy have poor progressionfree survival (PFS) and overall survival (OS), most commonly failing in original sites of gross disease. Cytoreduction with stereotactic body radiation therapy (SBRT) may help systemic agents delay relapse. Patients and Methods: Patients in our single arm phase II study had stage IV NSCLC with no more than six sites of extracranial disease who failed early systemic chemotherapy and were able to receive SBRT and concurrent erlotinib until disease progression. After erlotinib commencement, SBRT with equipotent fractionation was delivered to all sites of disease. PFS, OS, and other end points were evaluated. Results: Twenty-four patients (13 men and 11 women) with a median age of 67 years (range, 56-86 years) were enrolled with median follow-up of 11.6 months. All patients had progressed through platinum-based chemotherapy. A total of 52 sites were treated with 16 of 24 patients receiving SBRT to more than one site. Lung parenchyma was most often irradiated. Median PFS was 14.7 months, and median OS was 20.4 months. Most patients progressed in new distant sites with only three of 47 measurable lesions recurring within the SBRT field. Two grade 3 toxicities were radiation related. Zero of 13 patients tested were positive for an EGFR mutation. Conclusion: Use of SBRT with erlotinib for unselected patients with stage IV NSCLC as a second- or subsequent line therapy resulted in dramatic changes in patterns of failure, was well tolerated, and resulted in high PFS and OS, substantially greater than historical values for patients who only received systemic agents. J Clin Oncol 32:3824-3830 © 2014 by American Society of Clinical Oncology ■ ■ ■ continued Volume 32, Issue 34 December 1, 2014 Current Abstracts ................................................................................................................................................................................................ Increased Risk for Depression After Breast Cancer: A Nationwide Population-Based Cohort Study of Associated Factors in Denmark, 1998-2011 Nis P. Suppli, Christoffer Johansen, Jane Christensen, et al pp 3831-3839 Purpose: To investigate the risk for first depression, assessed as incident hospital contacts for depression and incident use of antidepressants, among women with breast cancer. Patients and Methods: Danish national registries were used to identify 1,997,669 women with no diagnosis of cancer or a major psychiatric disorder. This cohort was followed from 1998 to 2011 for a diagnosis of breast cancer and for the two outcomes, hospital contact for depression and redeemed prescriptions for antidepressants. Rate ratios for incident hospital contacts for depression and incident use of antidepressants were estimated with Poisson regression models. Multivariable Cox regression was used to evaluate factors associated with the two outcomes among patients with breast cancer. Results: We identified 44,494 women with breast cancer. In the first year after diagnosis, the rate ratio for a hospital contact for depression was 1.70 (95% CI 1.41 to 2.05) and that for use of antidepressants was 3.09 (95% CI 2.95 to 3.22); these rate ratios were significantly increased after 3 and 8 years, respectively. Comorbidity, node-positive disease, older age, basic and vocational educational levels, and living alone were associated with use of antidepressants. Conclusion: Women with breast cancer are at long-term increased risk for first depression, including both severe episodes leading to hospital contact and use of antidepressants. Clinicians should be aware that the risk is highest in women with comorbid conditions, node-positive disease, and age of 70 years or more. We found no clear association between type of surgery or adjuvant treatment and risk for depression. J Clin Oncol 32:3831-3839 © 2014 by American Society of Clinical Oncology ■ ■ ■ continued Volume 32, Issue 34 December 1, 2014 Current Abstracts ................................................................................................................................................................................................ Phase III Study of Iniparib Plus Gemcitabine and Carboplatin Versus Gemcitabine and Carboplatin in Patients With Metastatic Triple-Negative Breast Cancer Joyce O’Shaughnessy, Lee Schwartzberg, Michael A. Danso, et al pp 3840-3847 Purpose: There is a lack of treatments providing survival benefit for patients with metastatic triple-negative breast cancer (mTNBC), with no standard of care. A randomized phase II trial showed significant benefit for gemcitabine, carboplatin, and iniparib (GCI) over gemcitabine and carboplatin (GC) in clinical benefit rate, response rate, progression-free survival (PFS), and overall survival (OS). Here, we formally compare the efficacy of these regimens in a phase III trial. Patients and Methods: Patients with stage IV/locally recurrent TNBC who had received no more than two previous chemotherapy regimens for mTNBC were randomly allocated to gemcitabine 1,000 mg/m2 and carboplatin area under the curve 2 (days 1 and 8) alone or GC plus iniparib 5.6 mg/kg (days 1, 4, 8, and 11) every 3 weeks. Random assignment was stratified by the number of prior chemotherapies. The coprimary end points were OS and PFS. Patients receiving GC could cross over to iniparib on progression. Results: Five hundred nineteen patients were randomly assigned (261 GCI; 258 GC). In the primary analysis, no statistically significant difference was observed for OS (hazard ratio [HR] ⫽ 0.88; 95% CI, 0.69 to 1.12; P ⫽ .28) nor PFS (HR ⫽ 0.79; 95% CI, 0.65 to 0.98; P ⫽ .027). An exploratory analysis showed that patients in the second-/third-line had improved OS (HR ⫽ 0.65; 95% CI, 0.46 to 0.91) and PFS (HR ⫽ 0.68; 95% CI, 0.50 to 0.92) with GCI. The safety profile for GCI was similar to GC. Conclusion: The trial did not meet the prespecified criteria for the coprimary end points of PFS and OS in the ITT population. The potential benefit with iniparib observed in second-/third-line subgroup warrants further evaluation. J Clin Oncol 32:3840-3847 © 2014 by American Society of Clinical Oncology ■ ■ ■ continued Volume 32, Issue 34 December 1, 2014 Current Abstracts ................................................................................................................................................................................................ Clinical Outcome With Correlation to Disseminated Tumor Cell (DTC) Status After DTC-Guided Secondary Adjuvant Treatment With Docetaxel in Early Breast Cancer Bjørn Naume, Marit Synnestvedt, Ragnhild Sørum Falk, et al pp 3848-3857 Purpose: The presence of disseminated tumor cells (DTCs) in bone marrow (BM) predicts survival in early breast cancer. This study explores the use of DTCs for identification of patients insufficiently treated with adjuvant therapy so they can be offered secondary adjuvant treatment and the subsequent surrogate marker potential of DTCs for outcome determination. Patients and Methods: Patients with early breast cancer who had completed six cycles of adjuvant fluorouracil, epirubicin, and cyclophosphamide (FEC) chemotherapy underwent BM aspiration 2 to 3 months (BM1) and 8 to 9 months (BM2) after FEC. Presence of DTCs in BM was determined by immunocytochemistry using pan-cytokeratin monoclonal antibodies. If one or more DTCs were present at BM2, six cycles of docetaxel (100 mg/m2, once every 3 weeks) were administered, followed by DTC analysis 1 and 13 months after the last docetaxel infusion (after treatment). Cox regression analysis was used to evaluate disease-free interval (DFI). Results: Of 1,066 patients with a DTC result at BM2 and available follow-up information (median follow-up, 71.9 months from the time of BM2), 7.2% were DTC positive. Of 72 docetaxel-treated patients analyzed for DTCs after treatment, 15 (20.8%) had persistent DTCs. Patients with remaining DTCs had markedly reduced DFI (46.7% experienced relapse) compared with patients with no DTCs after treatment (adjusted hazard ratio, 7.58; 95% CI, 2.3 to 24.7). The docetaxel-treated patients with no DTCs after treatment had comparable DFI (8.8% experienced relapse) compared with those with no DTCs both at BM1 and BM2 (12.7% experienced relapse; P ⫽ .377, log-rank test). Conclusion: DTC status identifies high-risk patients after FEC chemotherapy, and DTC monitoring status after secondary treatment with docetaxel correlated strongly with survival. This emphasizes the potential for DTC analysis as a surrogate marker for adjuvant treatment effect in breast cancer. J Clin Oncol 32:3848-3857 © 2014 by American Society of Clinical Oncology ■ ■ ■ continued Volume 32, Issue 34 December 1, 2014 Current Abstracts ................................................................................................................................................................................................ Randomized Phase III Trial to Test Accelerated Versus Standard Fractionation in Combination With Concurrent Cisplatin for Head and Neck Carcinomas in the Radiation Therapy Oncology Group 0129 Trial: Long-Term Report of Efficacy and Toxicity Phuc Felix Nguyen-Tan, Qiang Zhang, K. Kian Ang, et al pp 3858-3866 Purpose: We tested the efficacy and toxicity of cisplatin plus accelerated fractionation with a concomitant boost (AFX-C) versus standard fractionation (SFX) in locally advanced head and neck carcinoma (LA-HNC). Patients and Methods: Patients had stage III to IV carcinoma of the oral cavity, oropharynx, hypopharynx, or larynx. Radiation therapy schedules were 70 Gy in 35 fractions over 7 weeks (SFX) or 72 Gy in 42 fractions over 6 weeks (AFX-C). Cisplatin doses were 100 mg/m2 once every 3 weeks for two (AFX-C) or three (SFX) cycles. Toxicities were scored by using National Cancer Institute Common Toxicity Criteria 2.0 and the Radiation Therapy Oncology Group/ European Organisation for Research and Treatment of Cancer criteria. Overall survival (OS) and progression-free survival (PFS) rates were estimated by using the Kaplan-Meier method and were compared by using the one-sided log-rank test. Locoregional failure (LRF) and distant metastasis (DM) rates were estimated by using the cumulative incidence method and Gray’s test. Results: In all, 721 of 743 patients were analyzable (361, SFX; 360, AFX-C). At a median follow-up of 7.9 years (range, 0.3 to 10.1 years) for 355 surviving patients, no differences were observed in OS (hazard ratio [HR], 0.96; 95% CI, 0.79 to 1.18; P ⫽ .37; 8-year survival, 48% v 48%), PFS (HR, 1.02; 95% CI, 0.84 to 1.24; P ⫽ .52; 8-year estimate, 42% v 41%), LRF (HR, 1.08; 95% CI, 0.84 to 1.38; P ⫽ .78; 8-year estimate, 37% v 39%), or DM (HR, 0.83; 95% CI, 0.56 to 1.24; P ⫽ .16; 8-year estimate, 15% v 13%). For oropharyngeal cancer, p16-positive patients had better OS than p16-negative patients (HR, 0.30; 95% CI, 0.21 to 0.42; P ⬍ .001; 8-year survival, 70.9% v 30.2%). There were no statistically significant differences in the grade 3 to 5 acute or late toxicities between the two arms and p-16 status. Conclusion: When combined with cisplatin, AFX-C neither improved outcome nor increased late toxicity in patients with LA-HNC. Long-term high survival rates in p16-positive patients with oropharyngeal cancer support the ongoing efforts to explore deintensification. J Clin Oncol 32:3858-3866 © 2014 by American Society of Clinical Oncology ■ ■ ■ continued Volume 32, Issue 34 December 1, 2014 Current Abstracts ................................................................................................................................................................................................ Impact of Reirradiation of Painful Osseous Metastases on Quality of Life and Function: A Secondary Analysis of the NCIC CTG SC.20 Randomized Trial Edward Chow, Ralph M. Meyer, Bingshu E. Chen, et al pp 3867-3873 Purpose: We previously demonstrated that 48% of patients with pain at sites of previously irradiated bone metastases benefit from reirradiation. It is unknown whether alleviating pain also improves patient perception of quality of life (QOL). Patients and Methods: We used the database of a randomized trial comparing radiation treatment dose fractionation schedules to evaluate whether response, determined using the International Consensus Endpoint (ICE) and Brief Pain Inventory pain score (BPI-PS), is associated with patient perception of benefit, as measured using the European Organisation for Resesarch and Treatment of Cancer (EORTC) Quality of Life Questionnaire Core 30 (QLQ-C30) and functional interference scale of the BPI (BPIFI). Evaluable patients completed baseline and 2-month follow-up assessments. Results: Among 850 randomly assigned patients, 528 were evaluable for response using the ICE and 605 using the BPI-PS. Using the ICE, 253 patients experienced a response and 275 did not. Responding patients had superior scores on all items of the BPI-FI (ie, general activity, mood, walking ability, normal work, relations with other people, sleep, and enjoyment of life) and improved QOL, as determined by scores on the EORTC QLQ-C30 scales of physical, role, emotional and social functioning, global QOL, fatigue, pain, and appetite. Similar results were obtained using the BPI-PS; observed improvements were typically of lesser magnitude. Conclusion: Patients responding to reirradiation of painful bone metastases experience superior QOL scores and less functional interference associated with pain. Patients should be offered retreatment for painful bone metastases in the hope of reducing pain severity as well as improving QOL and pain interference. J Clin Oncol 32:3867-3873 © 2014 by American Society of Clinical Oncology ■ ■ ■ continued Volume 32, Issue 34 December 1, 2014 Current Abstracts ................................................................................................................................................................................................ Pharmacokinetic and Pharmacodynamic Properties of Calaspargase Pegol Escherichia coli L-Asparaginase in the Treatment of Patients With Acute Lymphoblastic Leukemia: Results From Children’s Oncology Group Study AALL07P4 Anne L. Angiolillo, Reuven J. Schore, Meenakshi Devidas, et al pp 3874-3882 Purpose: Asparaginase is a critical agent used to treat acute lymphoblastic leukemia (ALL). Pegaspargase (SS-PEG), a pegylated form of Escherichia coli L-asparaginase with a succinimidyl succinate (SS) linker, is the first-line asparaginase product used in Children’s Oncology Group (COG) ALL trials. Calaspargase pegol (SC-PEG) replaces the SS linker in SS-PEG with a succinimidyl carbamate linker, creating a more stable molecule. COG AALL07P4 was designed to determine the pharmacokinetic and pharmacodynamic comparability of SC-PEG to SS-PEG in patients with newly diagnosed high-risk (HR) B-cell ALL. Patients and Methods: A total of 165 evaluable patients were randomly assigned at a 2:1 ratio to receive SC-PEG at 2,100 (SCPEG2100; n ⫽ 69) or 2,500 IU/m2 (SC-PEG2500; n ⫽ 42) versus SS-PEG 2,500 IU/m2 (SS-PEG2500; n ⫽ 54) as part of an otherwise identical chemotherapy regimen. The groups were similar demographically, except more female patients received SCPEG2500. Results: The mean half-life of plasma asparaginase activity for both SC-PEG doses was approximately 2.5⫻ longer than that of SSPEG2500. The total systemic exposure, as defined by induction area under the curve from time 0 to 25 days, was greater with SC-PEG2500 than with SS-PEG2500 or SC-PEG2100. The proportion of patients with plasma asparaginase activity ⱖ 100 mIU/mL and ⱖ 400 mIU/mL was higher in patients who received SC-PEG as compared with SS-PEG2500. After one dose of pegylated asparaginase on induction day 4, plasma asparagine was undetectable for 11 days for SS-PEG2500 and 18 days for both SCPEG groups. Conclusion: SC-PEG2500 achieves a significantly longer period of asparaginase activity above defined thresholds and asparagine depletion compared with SS-PEG2500 and has a comparable toxicity profile in children with HR B-cell ALL. J Clin Oncol 32:3874-3882 © 2014 by American Society of Clinical Oncology ■ ■ ■ continued Volume 32, Issue 34 December 1, 2014 Current Abstracts ................................................................................................................................................................................................ Pathologic Complete Response As a Potential Surrogate for the Clinical Outcome in Patients With Breast Cancer After Neoadjuvant Therapy: A Meta-Regression of 29 Randomized Prospective Studies Alfredo Berruti, Vito Amoroso, Fabio Gallo, et al pp 3883-3891 Purpose: To assess the role of pathologic complete response (pCR) after neoadjuvant therapy as surrogate end point of disease-free survival (DFS) and overall survival (OS) in patients with breast cancer, we performed a trial-based meta-regression of randomized studies comparing different neoadjuvant systemic treatments. Methods: The systematic literature search included electronic databases and proceedings of oncologic meetings. Endocrine therapy trials were excluded. Treatment effects on DFS and OS were expressed as hazard ratios (HRs), and treatment effects on pCR were expressed as odds ratios (ORs). A weighted regression analysis was performed on log-transformed treatment effect estimates to test the association between treatment effects on the surrogate outcome and treatment effects on the clinical outcome. Results: Twenty-nine trials, 59 arms, and 30 comparisons, for a total of 14,641 patients, were included in the analysis. Using the complete set of data, the regression of either the log(HR) for DFS or the log(HR) for OS on the log(OR) for pCR demonstrated only weak associations (R2 ⫽ 0.08; 95% CI, 0 to 0.47; and R2 ⫽ 0.09; 95% CI, 0.01 to 0.41, respectively). Better associations were found in an exploratory analysis assessing a subset of trials comparing intensified/dose-dense chemotherapy versus standard-dose regimens (DFS: R2 ⫽ 0.79; 95% CI, 0.26 to 0.95; P ⫽ .003; and OS: R2 ⫽ 0.57; 95% CI, 0.19 to 0.93; P ⫽ .03). Conclusion: This meta-regression analysis of 29 heterogeneous neoadjuvant trials does not support the use of pCR as a surrogate end point for DFS and OS in patients with breast cancer. However, pCR may potentially meet the criteria of surrogacy with specific systemic therapies. J Clin Oncol 32:3883-3891 © 2014 by American Society of Clinical Oncology ■ ■ ■ continued Volume 32, Issue 34 December 1, 2014 Current Abstracts ................................................................................................................................................................................................ Adjuvant and Salvage Radiotherapy After Prostatectomy: American Society of Clinical Oncology Clinical Practice Guideline Endorsement Stephen J. Freedland, R. Bryan Rumble, Antonio Finelli, et al pp 3892-3898 Purpose: To endorse the American Urological Association (AUA)/ American Society for Radiation Oncology (ASTRO) guideline on adjuvant and salvage radiotherapy after prostatectomy. The American Society of Clinical Oncology (ASCO) has a policy and set of procedures for endorsing clinical practice guidelines developed by other professional organizations. Methods: The guideline on adjuvant and salvage radiotherapy after prostatectomy was reviewed for developmental rigor by methodologists. An ASCO endorsement panel then reviewed the content and recommendations. Results: The panel determined that the guideline recommendations on adjuvant and salvage radiotherapy after prostatectomy, published in August 2013, are clear, thorough, and based on the most relevant scientific evidence. ASCO endorsed the guideline on adjuvant and salvage radiotherapy after prostatectomy, adding one qualifying statement that not all candidates for adjuvant or salvage radiotherapy have the same risk of recurrence or disease progression, and thus, risk-benefit ratios are not the same for all men. Those at the highest risk for recurrence after radical prostatectomy include men with seminal vesicle invasion, Gleason score 8 to 10, extensive positive margins, and detectable postoperative prostate-specific antigen (PSA). Recommendations: Physicians should discuss adjuvant radiotherapy with patients with adverse pathologic findings at prostatectomy (ie, seminal vesicle invasion, positive surgical margins, extraprostatic extension) and salvage radiotherapy with patients with PSA or local recurrence after prostatectomy. The discussion of radiotherapy should include possible short- and long-term adverse effects and potential benefits. The decision to administer radiotherapy should be made by the patient and multidisciplinary treatment team, keeping in mind that not all men are at equal risk of recurrence or clinically meaningful disease progression. Thus, the risk-benefit ratio will differ for eachqj? patient. J Clin Oncol 32:3892-3898 © 2014 by American Society of Clinical Oncology ■ ■ ■ FORTHCOMING REPORTS ................................................................................................................................................................................................ 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