Correlation of Doppler ultrasound resistive index in the prostatic gland with severity of male lower urinary tract symptoms, prostate volume, and concomitant diabetes mellitus.

Introduction: Benign prostatic enlargement (BPE) and type 2 diabetes mellitus (T2DM) are common in elderly men. This study aimed to correlate the Doppler resistive indices of prostatic arteries with the severity of lower urinary tract symptoms (LUTS) and prostate volume in men with concomitant BPE and T2DM.

Material and methods: Fifty men with T2DM and BPE (BPE-DM) as cases and 50 age-matched men with BPE but no T2DM (BPE-ND) as controls were enrolled. B-mode and power Doppler ultrasonography of the prostate gland were done for both groups.

Results: The mean total prostatic volume of the BPE-DM was 79.18 ±8.9 ml, while that of BPE-ND was 60.73 ±10.6 ml (p <0.0001). The mean prostatic resistive index (PRI) was significantly higher among BPE-DM than BPE-ND (0.74 ±0.02 vs 0.68 ±0.09 for right capsular artery; 0.77 ±0.04 vs 0.71 ±0.02 for left capsular artery; and 0.76 ±0.04 vs 0.70 ±0.02 for the urethral artery). BPE-DM with higher glycated haemoglobin, fasting plasma glucose, and longer duration of T2DM experienced more severe lower urinary tract symptoms and had higher PRI.

Conclusions: In conclusion, the BPE-DM group presented larger prostate glands and more bothersome LUTS, which correlated with higher PRI. Strict glycaemic control is necessary in men with co-existing BPE and T2DM.