An Elevated PSA Result: What Next, and Who Really Benefits From Repeat Testing?

Repeat PSA Testing: Which Patients Need It?

"My PSA Is Elevated—What Should I Do?" is one of the most common dilemmas in prostate cancer screening. An elevated PSA level does not always indicate cancer; an enlarged prostate, infection, sexual activity, or other urinary tract problems can also temporarily raise it. Proceeding directly to biopsy after a single elevated PSA result can therefore often lead to unnecessary interventions and anxiety .

For this reason, international guidelines recommend repeating an initially elevated PSA test . However, the benefit of repeat testing is not the same for everyone: some patients' values return to normal on the second test, while persistently elevated PSA in others makes further investigation necessary. The key is to identify which patients will actually benefit from repeat testing.

A large analysis published on 18 September 2025 in JAMA Oncologyexamined data from the Prostate, Lung, Colorectal and Ovarian (PLCO) screening trial to address this question. The study included 11,176 men aged 54–75 . Participants underwent annual PSA testing and had not been diagnosed with prostate cancer during that period. Three different biopsy thresholds were used to define “elevated PSA”: 2.5 ng/mL, 3.0 ng/mL, and 4.0 ng/mL. Researchers measured the likelihood that results above these thresholds would return to normal a year later.

🧮 Prediction Using a Risk Score

The researchers developed a risk model to calculate the likelihood that PSA levels would return to normal the following year:

• Persistently elevated PSA (score -3): probability of normalization <10%.
• Score -1: approximately 20%.
• Score 0: approximately 30%.
• Score 2: 50–60%.

Clinically, this means:

• For patients with a first elevated PSA result , repeat testing offers substantial benefit.
• If PSA remains above the threshold on at least two consecutive tests , repeat testing offers little benefit. In this situation, multiparametric prostate MRI or biopsy may be a more appropriate next diagnostic step.
• For patients with three consecutive elevated PSA results , the likelihood of normalization is almost zero.

🔍 Study Limitations

• Lifestyle and medication factors affecting PSA were not included in the analysis.
• Only annual testing was evaluated; shorter intervals were not examined.
• Men diagnosed with prostate cancer were excluded.