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Home All Specialties Oncology

Obesity linked with prostate cancer progression

byDavid WangandAndrew Bishara
June 24, 2014
in Oncology, Surgery, Urology
Reading Time: 2 mins read
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1. In men with low-risk prostate cancer undergoing active surveillance, obesity (BMI>30) was significantly associated with pathologic and therapeutic progression after the first confirmatory biopsy.

Evidence Rating Level: 3 (Average)

Study Rundown: Obesity has previously been associated with increased risk of advanced prostate cancer (PCa), risk of biochemical occurrence, and PCa specific mortality. However, the effect of obesity on the progression of low-risk PCa (Gleason score <6) is unclear. The authors of this paper retrospectively reviewed 152 normal and 413 overweight/obese men undergoing active surveillance (AS) for low-grade PCa for pathological or therapeutic progression of disease. After a median follow-up of 48 months, the study demonstrated that increased BMI categories are significantly associated with higher rate of pathological and therapeutic progression post-confirmatory biopsy. The results of this study suggests increased vigilance is needed in monitoring obese patients in AS. The strength of this article is the large sample size for a AS cohort, as well as the consistent biopsy protocol for men with normal and elevated BMI. However, the study is limited by the retrospective design and the inability to account for various lifestyle confounders (i.e. diet, exercise).

Click to read the study in European Urology

Relevant Reading: Obesity and Prostate Cancer: Weighing the Evidence

In-Depth [retrospective review]: This retrospective review analyzed the PSA and biopsy results of 565 men with low-grade PCa followed by AS. The primary outcomes were pathological (no longer meeting criteria for low-risk) or therapeutic (intent to initiate definitive treatment) progression of PCa. All patients were provided with a confirmatory biopsy after the initial diagnosis (median time from initial biopsy: 12 months). Cox proportional hazard models did not demonstrate significant association between BMI and PCa progression at the confirmatory biopsy (HR: 1.1; 95% CI: 0.8-1.5, p=0.6). However, BMI was significantly associated with PCa pathological and therapeutic progression post-confirmatory biopsy (above). Higher BMI was also associated with higher grade (p<0.05) and volume (p<0.03) progression post confirmatory biopsy.

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More from this author: Use of 5α-reductase inhibitors may not increase risk of high-grade prostate cancer, Asymptomatic H. pylori eradication decreased gastric cancer in Asian populations, Gender differences in white matter integrity may affect post-traumatic brain injury, Pulse oximetry screening improved detection of congenital heart disease in China, Stool DNA testing may improve screening sensitivity of colorectal cancer

Image: PD

©2012-2014 2minutemedicine.com. All rights reserved. No works may be reproduced without expressed written consent from 2minutemedicine.com. Disclaimer: We present factual information directly from peer reviewed medical journals. No post should be construed as medical advice and is not intended as such by the authors, editors, staff or by 2minutemedicine.com. PLEASE SEE A HEALTHCARE PROVIDER IN YOUR AREA IF YOU SEEK MEDICAL ADVICE OF ANY SORT. 

Tags: BMIobesityoncologyprostate cancerUrology
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