ASCO GU 2008 - RTOG Genitourinary Radiation Oncology Specialists Reach Consensus On Pelvic Lymph Node Volumes For High Risk Prostate Cancer

Main Category: Prostate / Prostate Cancer
Also Included In: Urology / Nephrology;  Radiology / Nuclear Medicine
Article Date: 24 Feb 2008 - 0:00 PDT

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UroToday.com - Dr. Lawton discussed the role for pelvic LN XRT in CaP. A survey performed at leading radiotherapy centers revealed that there was not consistent opinion on what pelvic XRT entailed. A meeting in 2007 reviewed the existing data on prostate nodal drainage and it appears that pre-sacral LNs have prostate drainage. The concept of extended LN disease extension along the internal iliac was also found. Only including the external obturator LN would capture only 15% of positive LN. The gynecologic radiation oncologists have similarly asked this question and concluded that the major blood vessels with a 7mm margin serve as a surrogate for the LN drainage.

The consensus is that contouring would commence at distal common iliac vessels at the L5/S1 interspace, get a 7mm margin around iliac vessels, include the pre-sacral LN, include external and internal iliac LN and end at the top of the pubic bone. External iliac lymph node contours end at the top of the femoral heads. Consensus on Organs at Risk were also attained during the meeting.

Presented by C. A. Lawton at the American Society of Clinical Oncology (ASCO) - 2008 Genitourinary Cancers Symposium - A Multidisciplinary Approach - February 14-16, 2008 San Francisco, California, USA

Reported by UroToday.com Contributing Editor Christopher P. Evans, MD, FACS Professor & Chairman Department of Urology University of California, Davis, School of Medicine Sacramento, CA

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