Objective To discuss the diagnostic values of transrectal ultrasound-guided puncture biopsy in prostate carcinoma(PCa).Methods A total of 238 patients with suspected PCa received tran-srectal ultrasound-guided puncture biopsy.Results Based on the results of biopsy pathology,88 cases (37.0%)were diagnosed as PCa,105 cases(44.1%)were benign prostate hyperplasia,15 cases (6.3%) were low-grade prostatic intraepithelial neoplasm,17 cases(7.1%)were atypical hyperplasia,8 cases(3. 4%)were adenomatoid tumor,and 5 cases(2.1%)were granulomatous prostatitis.Conclusion Tran-srectal ultrasound-guided puncture biopsy is accurate and safe.It is an effective method in diagnosing pros-tatic carcinoma.