Abstract: Abstract：Objective: We assessed correlation of intravesical prostatic protrusion（IPP） with the clinical symptoms in patients with benign prostatic hyperplasia(BPH).Methods: We retrospectively assessed 218 BPH patients from November 2007 to November 2009 in our hospital，IPP was measured by transabdominal ultrasound, accordance with Tan YH’s methods,the length of protrusion was classified as three group: IPP I 1-5mm or less,IPP II greater than 5 to 10mm and IPP III greater than 10mm.We assessed correlation of the length of IPP with clinical symptoms in patients with BPH.Results: IPP was found positively correlated with the prostate volume(PV), prostate-specific antigen(PSA), postvoid residual urin volume(PVR)and bladder out obstruction index(BOOI)(Spearman's rho=0.497，0.346，0.334，0.659，p <0.01）, negatively correlated with the peak urinary flow rate(Qmax)（Spearman's rho =-0.139, p < 0.05). PV was found statistically different between the per group（P<0.01）, PSA、Qmax、PVR and BOOI were found statistically different between IPP I and III（P < 0.05）,and between IPP II and III（P < 0.05）. Incidence of complication are increase with the step up of the group, were 40.82%，58.62%，68.47%,respectively. And the incidence was found statistically different between the per group（P=0.004）.There are 49 patients with serious complication,32 patients in IPP III(65.31%),10 in IPP II(20.41%)and 7 in IPP I(14.28%). The incidence of patients, who selected surgery ,are found statistically different between the per group,were 67.35%、89.66%、97.30%,respectively（ P＜0.01).Conclusion:There is a close correlation between the length of IPP with the voluminal and micturitional parameters of BPH,and between the degree of IPP with the incidence and severity of complication.Length of IPP could applied to reference of therapeutics.

Key words: benign prostatic hyperplasia, intravesical prostatic protrusion, grade, complication