What is a common clinical scenario for measuring prostatic acid phosphatase?

What is a common clinical scenario for measuring prostatic acid phosphatase?

• A. Prostate cancer screening
• B. Investigation of suspected ovarian cancer
• C. Assessment of prostate inflammation
• D. Evaluation of sexual assault cases

Answer: (A)

Prostatic acid phosphatase is a tumor marker historically tied to prostate cancer. It was commonly measured to screen for prostate cancer and to monitor disease activity, especially before PSA testing became standard. While PSA has largely overtaken PAP for screening today due to better sensitivity and specificity, PAP can still be relevant for monitoring advanced or recurrent prostate cancer, or in situations where PSA results don’t tell the full story. The other scenarios don’t align with PAP’s typical use: it’s not a marker for ovarian cancer, prostatitis can affect levels but isn’t the primary reason to measure PAP, and it’s not used to evaluate sexual assault cases.

Prostatic acid phosphatase is a tumor marker historically tied to prostate cancer. It was commonly measured to screen for prostate cancer and to monitor disease activity, especially before PSA testing became standard. While PSA has largely overtaken PAP for screening today due to better sensitivity and specificity, PAP can still be relevant for monitoring advanced or recurrent prostate cancer, or in situations where PSA results don’t tell the full story. The other scenarios don’t align with PAP’s typical use: it’s not a marker for ovarian cancer, prostatitis can affect levels but isn’t the primary reason to measure PAP, and it’s not used to evaluate sexual assault cases.