PURPOSE: To investigate the prognostic utility of the percentage of cancer volume (PCV) in needle biopsy specimens for prostate cancer patients treated with dose-escalated external beam radiotherapy. METHODS AND MATERIALS: The outcomes were analyzed for 599 men treated for localized prostate cancer with external beam radiotherapy to a minimal planning target volume dose of 75 Gy (range, 75-79.2). We assessed the effect of PCV and the pretreatment and treatment-related factors on the freedom from biochemical failure, freedom from metastasis, cause-specific survival, and overall survival. RESULTS: The median number of biopsy cores was 7 (interquartile range, 6-12), median PCV was 10% (interquartile range, 2.5-25%), and median follow-up was 62 months. The PCV correlated with the National Comprehensive Cancer Network risk group and individual risk features, including T stage, prostate-specific antigen level, Gleason score, and percentage of positive biopsy cores. On log-rank analysis, the PCV stratified by quartile was prognostic for all endpoints, including overall survival. In addition, the PCV was a stronger prognostic factor than the percentage of positive biopsy cores when the two metrics were analyzed together. On multivariate analysis, the PCV predicted a worse outcome for all endpoints, including freedom from biochemical failure, (hazard ratio, 1.9; p = .0035), freedom from metastasis (hazard ratio, 1.7, p = .09), cause-specific survival (hazard ratio, 3.9, p = .014), and overall survival (hazard ratio, 1.8, p = .02). CONCLUSIONS: For patients treated with dose-escalated external beam radiotherapy, the volume of cancer in the biopsy specimen adds prognostic value for clinically relevant endpoints, particularly in intermediate- and high-risk patients. Although the PCV determination is more arduous than the percentage of positive biopsy cores, it provides superior risk stratification.
PURPOSE: To investigate the prognostic utility of the percentage of cancer volume (PCV) in needle biopsy specimens for prostate cancerpatients treated with dose-escalated external beam radiotherapy. METHODS AND MATERIALS: The outcomes were analyzed for 599 men treated for localized prostate cancer with external beam radiotherapy to a minimal planning target volume dose of 75 Gy (range, 75-79.2). We assessed the effect of PCV and the pretreatment and treatment-related factors on the freedom from biochemical failure, freedom from metastasis, cause-specific survival, and overall survival. RESULTS: The median number of biopsy cores was 7 (interquartile range, 6-12), median PCV was 10% (interquartile range, 2.5-25%), and median follow-up was 62 months. The PCV correlated with the National Comprehensive Cancer Network risk group and individual risk features, including T stage, prostate-specific antigen level, Gleason score, and percentage of positive biopsy cores. On log-rank analysis, the PCV stratified by quartile was prognostic for all endpoints, including overall survival. In addition, the PCV was a stronger prognostic factor than the percentage of positive biopsy cores when the two metrics were analyzed together. On multivariate analysis, the PCV predicted a worse outcome for all endpoints, including freedom from biochemical failure, (hazard ratio, 1.9; p = .0035), freedom from metastasis (hazard ratio, 1.7, p = .09), cause-specific survival (hazard ratio, 3.9, p = .014), and overall survival (hazard ratio, 1.8, p = .02). CONCLUSIONS: For patients treated with dose-escalated external beam radiotherapy, the volume of cancer in the biopsy specimen adds prognostic value for clinically relevant endpoints, particularly in intermediate- and high-risk patients. Although the PCV determination is more arduous than the percentage of positive biopsy cores, it provides superior risk stratification.
Authors: Elspeth Raymond; Michael E O'Callaghan; Jared Campbell; Andrew D Vincent; Kerri Beckmann; David Roder; Sue Evans; John McNeil; Jeremy Millar; John Zalcberg; Martin Borg; Kim Moretti Journal: Radiat Oncol Date: 2017-03-21 Impact factor: 3.481
Authors: Jure Murgic; Matthew H Stenmark; Schuyler Halverson; Kevin Blas; Felix Y Feng; Daniel A Hamstra Journal: Radiat Oncol Date: 2012-08-01 Impact factor: 3.481
Authors: Maurizio Del Monte; Stefano Cipollari; Francesco Del Giudice; Martina Pecoraro; Marco Bicchetti; Emanuele Messina; Ailin Dehghanpour; Antonio Ciardi; Alessandro Sciarra; Carlo Catalano; Valeria Panebianco Journal: Br J Radiol Date: 2021-10-05 Impact factor: 3.039
Authors: Juho Jasu; Teemu Tolonen; Emmanuel S Antonarakis; Himisha Beltran; Susan Halabi; Mario A Eisenberger; Michael A Carducci; Yohann Loriot; Kim Van der Eecken; Martijn Lolkema; Charles J Ryan; Sinja Taavitsainen; Silke Gillessen; Gunilla Högnäs; Timo Talvitie; Robert J Taylor; Antti Koskenalho; Piet Ost; Teemu J Murtola; Irina Rinta-Kiikka; Teuvo Tammela; Anssi Auvinen; Paula Kujala; Thomas J Smith; Pirkko-Liisa Kellokumpu-Lehtinen; William B Isaacs; Matti Nykter; Juha Kesseli; G Steven Bova Journal: Eur Urol Open Sci Date: 2021-07-02