Objectives: The aim of this study was to identify whether intravesical prostatic protrusion (IPP) is related to the characteristics of voiding symptoms improvement after drug treatment in benign prostatic hyperplasia patients.
Methods: Ninety male patients with more than 30 g prostate volume were prospectively enrolled. All patients were evaluated with International Prostate Symptoms Score (IPSS), uroflowmetry, postvoid residual urine (PVR), prostate volume and IPP measurement by transrectal ultrasound. Treatment response was evaluated again by IPSS after 12 weeks of medication. We evaluated the correlation of IPP and IPSS, quality of life (QoL) score, maximum urinary flow rate (Qmax) and PVR, and compared IPPS and IPSS subscale score change between the IPP and non-IPP groups.
Results: IPP was significantly correlated with total IPSS, voiding/storage symptom subscore and PVR. IPP was inversely correlated with Qmax. IPP showed a significant correlation with storage symptoms after an adjustment of prostate volume. After 12 weeks of medication, the IPP group showed persistently high storage symptoms than the non-IPP group.
Conclusion: BPH patients with IPP showed less improvement of storage symptoms after 12 weeks of medication. This study suggests that IPP may be a possible cause of intractable storage symptoms in early treatment.