What is the role of PSA testing in screening for prostate cancer and its limitations?

Prepare thoroughly for the Genitourinary System Disorders Test. Explore flashcards and multiple choice questions with explanations. Enhance your readiness for the examination!

PSA testing in prostate cancer screening is a useful but imperfect tool. PSA can help detect potential cancer, but the test is not cancer-specific. Elevated PSA levels can occur with benign prostatic hyperplasia or prostatitis, and even with recent ejaculation or procedures, leading to false positives. Because many cancers found through PSA screening may be slow-growing and not cause harm, screening carries the risk of overdiagnosis and may lead to unnecessary biopsies and treatment. A high PSA prompts further evaluation—such as repeat testing, digital rectal examination, imaging, and biopsy—but a PSA result alone does not diagnose cancer. It does not replace the digital rectal exam; rather, both are used together to assess risk. Starting PSA screening at age 25 is not appropriate for average-risk individuals; guidelines generally recommend starting later (around age 50 for average risk, earlier for higher-risk groups) and tailoring frequency to individual risk.