PSA Testing in Men with Lower Urinary Tract Symptoms

Indications for PSA Testing

The American Urological Association recommends that men with lower urinary tract symptoms (LUTS) should undergo PSA testing only if their life expectancy exceeds 10 years and a diagnosis of prostate cancer would change their management approach 1, 2, 3, 4, 5, 6
PSA measurement serves two distinct clinical purposes in men presenting with LUTS: cancer screening consideration and treatment planning, as it reasonably predicts prostate volume 1, 2, 3, 4, 5, 6

Before ordering PSA, the patient should be informed about the risks of false-positive and false-negative results, which are common 1, 2, 3, 4, 5, 6
The patient should also be informed about the potential complications of biopsy, including infection, bleeding, and pain from transrectal ultrasound-guided procedures 1, 2, 3, 4, 5, 6

PSA is part of a comprehensive assessment, which includes history and symptom quantification using IPSS or similar validated questionnaires 1, 2, 3, 4, 5, 6
Digital rectal examination (DRE) should be performed to assess prostate size, consistency, and nodularity suspicious for cancer 1, 2, 3, 4, 5, 6, 7
Urinalysis should be performed to exclude infection, hematuria, and other pathology 1, 2, 3, 4, 5, 6, 7

Approximately 75% of men with symptomatic benign prostatic hyperplasia (BPH) have PSA <4 ng/mL, yet can still have significant prostatic enlargement 7
Abnormal DRE findings mandate further evaluation regardless of PSA level 7
If both PSA is elevated and DRE is abnormal, proceed directly to prostate biopsy 7