A case of alkaline encrusted cystitis is described in a 67 year old man with a history of urinary infections, laboratory alkalisation of urine and in cystoscopy focal calcium deposits on the wall of the bladder trigone. Surgical exicion of calcified plaque was performed and complementary treatment with antibiotics and urease inhibitors was done. The patient remains well until now. This rare form of cystitis seems to be a concrete clinical and histopathological entity with a good prognosis when the diagnosis is set ontime and the adequate treatment is applied.

Key words: Alkaline encrusted cystitis.

Full text in Greek