Clinical significance of peripheral zone thickness in men with lower urinary tract symptoms/benign prostatic hyperplasia

Objective To evaluate the clinical impact of prostate peripheral zone thickness (PZT), based on presumed circle area ratio (PCAR) theory, on urinary symptoms in men with lower urinary tract symptoms/benign prostatic hyperplasia (LUTS/BPH) as a novel prostate parameter. Patients and methods Medical records were obtained from a prospective database of first‐visit men with LUTS/BPH. Age, international prostate symptom score (IPSS), overactive bladder symptom score (OABSS), maximum urinary flow rate (Qmax), and post‐void residual urine volume (PVR) were assessed. Total prostate volume (TPV), transition zone volume (TZV), transition zone index (TZI), and PZT were measured by transrectal ultrasonography. Reliability analysis was also performed. Results In all, 1009 patients were enrolled for the analysis. The mean (sd) PZT was 11.10 (2.50) mm, and patients were classified into three groups PZT thickness groups; PZT