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Abstract

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Purpose: To evaluate the clinical usefulness of PAP in staging and monitoring of
patient with prostate cancer, we performed a comparative study with PSA,
retrospectively.
Methods: We evaluated 72 patients with prostate cancer. Of these patients 11 had
stage A, 6 stage B, 10 stage C, 5 stage D1 and 40 stage D2 prostate cancer. Serum
PAP level was measured in all 72 patients and serum PSA level was measured
concomitantly in 42 patients.
Results: The mean initial PAP value was 13.40¡¾7.00 U/L. But only 40(55.6%) had
elevated PAP value abode l.5U/L at presentation. Of 55 advanced cases (stage C, D), 39
(76.9%) had elevated PAP values. Of the 42 patients, who underwent longitudinal PSA
assessment, the mean initial PSA value was 178.0¡¾33.3 ng/ml. Forty (95.2%) had
elevated PSA value abode 4 ng/ml at presentation. Of 41 advanced cases (stage C, D1,
D2), 33 (80.5%) exceeded 50 ng/ml. None of the patient had elevated PAP value with
normal PSA value at presentation. Among 42 patients, who had followed with
longitudinal serum PSA and PAP, progression of the disease to the bone, lung, and
rectum occurred in 26 patients; in all PSA was the first indicator of progression and in
none of them PAP anticipated PSA elevation.
Conclusions: Althougted PAP value usually reflects advanced prostate cancer (70.9%),
serum PSA also reflects it (80.5%). Serum PSA monitoring is superior to serum PAP
monitoring in predicting disease progression. The use of PSA and PAP jointly to stage
and monitor prostate cancer did not appear to enhance the clinical utility over that of
PSA alone.

Å°¿öµå

Prostate specific antigen; Prostatic acid phosphatase; Prostate cancer;

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