Abstract:
OBJECTIVES:To identify a population of patients within the group with positive surgical margins after radical prostatectomy who would benefit in terms of improved local control of disease by the administration of adjuvant radiation therapy to the prostate bed. METHODS:Postoperative prostate-specific antigen (PSA) values were evaluated in 45 patients with margin-positive (MP) disease who underwent adjuvant radiotherapy within 6 months of surgery. All patients were clinically T1-2 MO, and pNO. A cutoff of 0.5 ng/mL or less was used as the level below which PSA was considered undetectable. The mean follow-up time from date of radiation was 33 months. RESULTS:In 30 of 45 (67%) patients, PSA levels did drop to undetectable levels postoperatively. In 15 of 45 (33%) patients postoperative PSA levels did not drop to undetectable levels. In the group with detectable postoperative PSA, 12 of 15 (80%) failed adjuvant radiotherapy as determined by a progressive increase in PSA levels in a mean time of 0.95 years (range, 4 months to 2.02 years; median, 0.92 years). When postoperative PSA reached undetectable levels, only 10 of 30 (33%) failed treatment, with a mean time to failure of 2.1 years (range, 4 months to 7.8 years; median, 3.31 years). CONCLUSIONS:The data would suggest that patients who are MP, but attain an undetectable PSA level postoperatively accompanied by a progressive delayed increase in PSA, probably represent a group with local disease recurrence in the prostate fossa, whereas patients whose PSA levels are detectable postoperatively may represent a group with microscopic metastatic disease or a combination of local recurrence and distant disease or large volume local persistent disease. It is in the group of patients in whom the postoperative PSA decreased to undetectable levels that adjuvant radiotherapy may be effective in controlling local progression of prostate cancer through improved local control, as indicated by a durable decrease in PSA values to undetectable levels in roughly two thirds of these patients. Longer follow-up of these patients will be required to determine whether this improved local control will translate into improved survival.
journal_name
Urologyjournal_title
Urologyauthors
Coetzee LJ,Hars V,Paulson DFdoi
10.1016/s0090-4295(99)80422-1subject
Has Abstractpub_date
1996-02-01 00:00:00pages
232-5issue
2eissn
0090-4295issn
1527-9995pii
S0090429599804221journal_volume
47pub_type
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