What is the primary use of the Prostate-Specific Antigen (PSA) test?

The primary use of the Prostate-Specific Antigen (PSA) test is to monitor prostate cancer after initial treatment. PSA is a protein produced by both normal and malignant cells of the prostate gland, and its levels can be indicative of the presence of prostate cancer. Following treatment for prostate cancer, such as surgery or radiation therapy, regular PSA testing helps healthcare providers assess whether the treatment was effective and if the cancer has recurred. Elevated levels of PSA after treatment may suggest that the cancer has returned, guiding further diagnostic and therapeutic decisions.

While there can be discussions about the use of PSA in the early detection of prostate cancer, its most critical role lies in the post-treatment monitoring phase. This focus is essential for ongoing patient management and ensuring timely interventions if necessary. The other options do not relate to the specific utility of the PSA test in oncology practice.