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Nadir <0.2 or iPSA<10 longest time off IAD after RT failure


JimmyToowong

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Cancer. 2007 Mar 1;109(5):858-67.

Locally advanced prostate cancer--biochemical results from a prospective phase II study of intermittent androgen suppression for men with evidence of prostate-specific antigen recurrence after radiotherapy.

ALSO

Bruchovsky N, Klotz L, Crook J, Goldenberg SL.

The Prostate Center at Vancouver General Hospital, Division of Urology, Department of Surgery, University of British Columbia, Vancouver, British Columbia, Canada. nbeinc@telus.net

Comment in:

* Cancer. 2007 Jul 15;110(2):467-8; author reply 468.

Abstract

BACKGROUND: Biochemical results from a prospective Phase II trial of intermittent androgen suppression for recurrent prostate cancer after radiotherapy were analyzed for correlations to the onset of hormone-refractory disease. METHODS: Patients with histologically confirmed adenocarcinoma of the prostate and a rising serum prostate-specific antigen (PSA) level after external beam irradiation of the prostate were treated intermittently with a 36-week course of cyproterone acetate and leuprolide acetate. Then, patients were stratified according to their serum PSA range at the start of each cycle and were followed with further biochemical testing until disease progression was evident.

RESULTS: The mean PSA reduction was 95.2% irrespective of stratification group. A baseline serum PSA level <10 microg/L and a serum PSA nadir <or=0.2 microg/L were associated with the longest time off treatment. The overall mean nadir PSA value in the progression group at 1.40 +/- 0.19 microg/L was 2.6-fold greater than the value of 0.55 +/- 0.88 microg/L in the no-progression group (P = .0002). Recovery of serum testosterone to a level of >or=7.5 nmol/L was observed in 75%, 50%, 40%, and 30% of men in Cycles 1 to 4, respectively, and was sufficient to normalize the level of hemoglobin in each cycle, which dropped by an average of 10.8 g/L during treatment (P < .0001).

CONCLUSIONS: The length of the off-treatment interval during cyclic androgen withdrawal therapy was related inversely to baseline and nadir levels of serum PSA. Nadir PSA was a powerful predictor of early progression to androgen independence.

PMID: 17265527 Forum: Primary hormone therapy Title: Nadir <0.2 or iPSA<10 longest time off IAD after RT failure

This extract can be found on http://PubMed.com, and is in the public domain.

On PubMed.com there will be a link to the full paper (often $30, sometimes free).

Any highlighting (except the title) is not by the author, but by Jim Marshall.

Jim is not a doctor.

This page was found on the Advanced Prostate Cancer Community for Australian men at http://advancedprost...lia.ipbhost.com.

The link is hard to remember.

An easier way to find it is to go to JimJimJimJim.com and click on Prostate.

That's the word Jim four times, no spaces, followed by .com.

If you need other help - to perhaps find someone to talk to or a local support group:

Click on the Contact Jim button at http://JimJimJimJim.com.

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