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Background: To evaluate the strategy for detection of prostate cancer (PCa) with low prostate specific antigen (PSA) level (2.5–4.0 ng/mL), prostate biopsy patients with low PSA were assessed. We evaluated the risk of low PSA PCa and the strategy for screening low-PSA patients. Methods: We retrospectively analyzed the patients who underwent prostate biopsy with low PSA level. Baseline characteristics, PSA level before prostate biopsy, prostate volume, prostate specific antigen density (PSAD), and pathological data were assessed. Results: Among the 1986 patients, 24.97% were diagnosed with PCa. The PSAD was 0.12 ± 0.04 ng/mL2 in the PCa-diagnosed group and 0.10 ± 0.04 ng/mL2 in non-cancer-diagnosed group (P < 0.001). Of the 496 patients diagnosed with PCa, 302 (60.89%) were in the intermediateor high-risk group. PSAD was 0.13 ± 0.04 ng/mL2 in the intermediateor highrisk group and 0.11 ± 0.03 ng/mL2 in the very lowand low-risk group (P < 0.001). Of 330 patients who underwent radical prostatectomy, 85.15% were diagnosed as having significant cancer. There was significant correlation between PSAD and PCa (r = 0.294, P < 0.001). Prostate-specific antigen density with a specificity of 80.00% of a clinically significant cancer diagnosis was assessed at 0.1226 ng/mL2. Conclusion: The PCa detection rate in the low-PSA group was not lower than that of previous studies of patients with PSA from 4.0 to 10.0 ng/mL. Further, it may be helpful to define a strategy for PCa detection using PSAD in the low-PSA group.

Strategy for prostate cancer patients with low prostate specific antigen level (2.5 to 4.0 ng/ mL)