title: Reversible change of bladder hypertrophy due to benign prostatic hyperplasia after surgical relief of obstruction.
abstract: OBJECTIVE
  Ultrasound estimated bladder weight was compared before and after surgery for benign prostatic hyperplasia (BPH) to reveal a possible reversible change in bladder hypertrophy.
  
  
  METHODS
  Ultrasound estimated bladder weight was measured before and after subcapsular (17) or transurethral (16) prostatectomy in 33 male patients with BPH. Sequential changes in the American Urological Association symptom score and urinary flow rate were also examined.
  
  
  RESULTS
  Along with a significant improvement in the American Urological Association symptom scores and maximum flow rate, ultrasound estimated bladder weight decreased from 52.9 +/- 22.6 to 31.6 +/- 15.8 gm. in 12 weeks after treatment. In all but 4 patients (29 of 33, or 87.9%) ultrasound estimated bladder weight decreased to less than 35.0 gm. in 12 weeks after treatment. Interestingly, in all patients with an initial ultrasound estimated bladder weight of greater than 80 gm. the bladder weight still remained at an abnormally high level 12 weeks after treatment.
  
  
  CONCLUSIONS
  Bladder hypertrophy was completely reversible after the surgical treatment of the obstruction in the majority of patients with BPH. The measurement of ultrasound estimated bladder weight was of value in monitoring therapeutic effects in BPH patients. An extraordinarily high ultrasound estimated bladder weight of 80 gm. or more might suggest degenerative and irreversible pathological changes in the bladder detrusor.
authors.affiliation: Department of Urology, Kyoto Prefectural University of Medicine, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Kojima
authors.forename: E
authors.initials: E
authors.lastname: Inui
authors.forename: A
authors.initials: A
authors.lastname: Ochiai
authors.forename: Y
authors.initials: Y
authors.lastname: Naya
authors.forename: K
authors.initials: K
authors.lastname: Kamoi
authors.forename: O
authors.initials: O
authors.lastname: Ukimura
authors.forename: H
authors.initials: H
authors.lastname: Watanabe
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D006801:Humans; D006984:Hypertrophy / Q000150:complications / Q000000981:diagnostic imaging; D008297:Male; D008875:Middle Aged; D009929:Organ Size; D011470:Prostatic Hyperplasia / Q000150:complications*; D014463:Ultrasonography; D001743:Urinary Bladder / Q000000981:diagnostic imaging / Q000473:pathology*; D001748:Urinary Bladder Neck Obstruction / Q000209:etiology / Q000601:surgery*