Department of Radiology/Radiation Oncology, Baylor College of Medicine, Houston, Texas.

To report prostate-specific antigen (PSA) bounce in patients treated with intensity-modulated radiotherapy (IMRT) alone. Previous studies have reported PSA bounce in prostate cancer patients treated with conventional radiotherapy, 3D conformal radiotherapy, and permanent seed brachytherapy.

From January 1997 to July 2002, 102 patients with clinically localized prostate cancer were treated with IMRT alone. No patients received androgen ablation. PSA bounce was defined as a PSA increase of at least 0.4 ng/mL, followed by any PSA decrease. Biochemical failure was defined by both the American Society for Therapeutic Radiology and Oncology 1996 and 2006 consensus definitions.

The median follow-up was 76 months. The median length of time until the first PSA bounce was 13.6 months. Thirty-three patients (32.4%) had at least 1 PSA bounce, with 25 (24.5%) having 1 bounce; 6 (5.9%), 2 bounces; and 2 (2.0%), 4 bounces. PSA bounce was not significantly associated with biochemical no evidence of disease survival, clinical stage, pretreatment PSA, Gleason combined score, prostate planning target volume, PSA nadir, or mean dose to the prostate. The rate of PSA bounce in patients aged < /= 70 and > 70 years was 44.4% and 22.8%, respectively (P = .032).

Our patient series is the first report on PSA bounce in patients treated with IMRT. Our study confirms that the majority of patients with a bouncing PSA remain biochemically and clinically free of disease with extended follow-up.

Written by:
Sheinbein C, Teh BS, Mai WY, Grant W, Paulino A, Butler EB.   Are you the author?

Reference:
Urology. 2009 Jul 16. Epub ahead of print.
doi:10.1016/j.urology.2009.04.074

PubMed Abstract
PMID:19616279

UroToday.com Prostate Cancer Section

Please log-in or register in order to submit comments.

Powered by AkoComment!