title: [Calculus formation in the prostatic cavity after transurethral resection of the prostate: causes, treatment and prevention].
abstract: OBJECTIVE
  To study the causes, clinical manifestations, treatment and prevention of calculus that develops in the prostatic cavity after transurethral resection of the prostate.
  
  
  METHODS
  We reported 11 cases of calculus that developed in the prostatic cavity after transurethral resection or transurethral plasmakinetic resection of prostate. The patients complained of repeated symptoms of frequent micturition, urgent micturition and urodynia after operation, accompanied with urinary tract infection and some with urinary obstruction, which failed to respond to anti-infective therapies. Cystoscopy revealed calculi in the prostatic cavity, with eschar, sphacelus, uneven wound surface and small diverticula in some cases. After diagnosis, 1 case was treated by holmium laser lithotripsy and a second transurethral resection of the prostate, while the other 10 had the calculi removed under the cystoscope, followed by 1 -2 weeks of anti-infective therapy.
  
  
  RESULTS
  After treatment, all the 11 cases showed normal results of routine urinalysis, and no more symptoms of frequent micturition, urgent micturition and urodynia. Three- to six-month follow-up found no bladder irritation symptoms and urinary tract infection.
  
  
  CONCLUSIONS
  Repeated symptoms of frequent micturition, urgent micturition, urodynia and urinary tract infection after transurethral resection of the prostate should be considered as the indicators of calculus in the prostatic cavity, which can be confirmed by cystoscopy. It can be treated by lithotripsy or removal of the calculus under the cystoscope, or even a second transurethral resection of the prostate. For its prevention, excessive electric coagulation and uneven wound surface should be avoided and anti-infection treatment is needed.
authors: Department of Urology, Nanjing General Hospital of Nanjing Military Region, Nanjing, Jiangsu 210002, China. zhifeng999@126.com
authors: Zhi-Feng
authors: ZF
authors: Wei
authors: Xiao-Feng
authors: XF
authors: Xu
authors: Wen
authors: W
authors: Cheng
authors: Wen-Quan
authors: WQ
authors: Zhou
authors: Jing-Ping
authors: JP
authors: Ge
authors: Zheng-Yu
authors: ZY
authors: Zhang
authors: Jian-Ping
authors: JP
authors: Gao
mesh_terms: D000368:Aged; D006801:Humans; D008297:Male; D008875:Middle Aged; D011469:Prostatic Diseases / Q000209:etiology / Q000517:prevention & control / Q000628:therapy; D020728:Transurethral Resection of Prostate / Q000009:adverse effects* / Q000379:methods; D014545:Urinary Calculi / Q000209:etiology / Q000517:prevention & control / Q000628:therapy