[Alkaline encrusted cystitis: factors affecting prognosis].

Alkaline encrusted cystitis is characterized by the formation of calcareous plaques in the bladder mucosa and submucosa in the presence of several factors: infection by urolithic organisms, earlier pathology of the vesical wall and precipitation of calcium phosphate salts. Treatment includes: urine acidification, correction of the urinary infection and use of acetohydroxamic acid. This paper presents three patients where the response to medical treatment was conditioned by the evolution of the existing vesical impairment. The conclusions state that in the alkaline encrusted cystitis, the concurrent pathology is a major predictor of the disease's future evolution.