title: Correlation of male overactive bladder with intravesical prostatic protrusion.
abstract: OBJECTIVE
  Male overactive bladder (OAB) may be caused by prostatic pathologies such as bladder outlet obstruction (BOO). Intravesical prostatic protrusion (IPP) has been found to correlate with BOO and acute urinary retention. We investigated the interrelation between male OAB symptoms and IPP for estimating anatomical changes to the prostate.
  
  
  METHODS
  We assessed 179 consecutive men aged >40 years who presented with lower urinary tract symptoms. The initial evaluation included International Prostate Symptom Score (IPSS) and quality of life assessments, transrectal ultrasonography (TRUS), uroflowmetry, and postvoid residual urine volume. The degree of IPP was determined by the distance from the tip of the protrusion to the circumference of the bladder at the base of the prostate gland. Patients with IPP <0.5 cm were defined as group A (n=114), and patients having 0.5 cm≤IPP<1 cm were defined as group B (n=38). The others were defined as group C (n=27).
  
  
  RESULTS
  A total of 51 patients complained of urgency in group A, 38 patients in group B, and 27 patients in group C. Likewise, 14 patients had a history of acute urinary retention in group A, 8 patients in group B, and 16 patients in group C. IPP grade had a statistically significant relation with both OAB and a history of acute urinary retention.
  
  
  CONCLUSIONS
  The results of our study have shown that male OAB is correlated with IPP. However, larger scale studies are needed to confirm these results.
authors.affiliation: Department of Urology, National Health Insurance Corporation Ilsan Hospital, Goyang, Korea.
authors.forename: Ki Hong
authors.initials: KH
authors.lastname: Kim
authors.forename: Young Sig
authors.initials: YS
authors.lastname: Kim