Pre-radiation PSA predicts outcome in high baseline PSA >40

[JimmyToowong]

Extreme-risk prostate adenocarcinoma presenting with prostate-specific antigen (PSA) >40 ng/ml: Prognostic significance of the preradiation PSA nadir - Abstract

Thursday, 03 March 2011

British Columbia Cancer Agency, Vancouver Island Centre, Radiation Therapy Program, Victoria, British Columbia, Canada. University of British Columbia, Vancouver, British Columbia, Canada.

To examine the impact of patient, disease, and treatment characteristics on survival outcomes in patients treated with neoadjuvant androgen deprivation therapy (ADT) and radical external-beam radiotherapy (RT) for clinically localized, extreme-risk prostate adenocarcinoma with a presenting prostate-specific antigen (PSA) concentration of >40 ng/ml.

A retrospective chart review was conducted of 64 patients treated at a single institution between 1991 and 2000 with ADT and RT for prostate cancer with a presenting PSA level of >40 ng/ml. The effects of patient age, tumor (presenting PSA level, Gleason score, and T stage), and treatment (total ADT duration and pre-RT PSA level) characteristics on rates of biochemical disease-free survival (bDFS), prostate cancer-specific survival (PCSS), and overall survival (OS) were examined.

Median follow-up time was 6.45 years (range, 0.09-15.19 years). Actuarial bDFS, PCSS, and OS rates at 5 years were 39%, 87%, and 78%, respectively, and 17%, 64%, and 45%, respectively, at 10 years. On multivariate analysis, the pre-RT PSA level (? 0.1 versus >0.1 ng/ml) was the single most significant prognostic factor for bDFS (p = 0.033) and OS (p = 0.018) rates, whereas age, T stage, Gleason score, and ADT duration (? 6 versus >6 months) were not predictive of outcomes. [jm]

In prostate cancer patients with high presenting PSA levels, >40 ng/ml, treated with combined modality, neoadjuvant ADT, and RT, the pre-RT PSA nadir, rather than ADT duration, was significantly associated with improved survival. This observation supports the use of neoadjuvant ADT to drive PSA levels to below 0.1 ng/ml before initiation of RT, to optimize outcomes for patients with extreme-risk disease.

Written by:

Alexander AS, Mydin A, Jones SO, Christie J, Lim JT, Truong PT, Ludgate CM.

Reference: Int J Radiat Oncol Biol Phys. 2011 Jan 27. Epub ahead of print.

doi: 10.1016/j.ijrobp.2010.11.068

PubMed Abstract

PMID: 21277102 Forum: Primary hormone therapy Title: Pre-radiation PSA predicts outcome in high baseline PSA (>40ng/ml)

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