[Secondary bladder amyloidosis: a case of salvage cystectomy for massive hematuria].

Amyloidosis of the bladder associated with systemic amyloidosis secondary to rheumatoid arthritis is a rare disease. Due to the absence of routine screening, its incidence appears to be understimated and only 11 cases, all symptomatic, have been reported in the literature. The symptoms of this disease are dominated by macroscopic haematuria, always massive, which may be life-threatening. We report a case in which the severity of this haematuria required emergency cystectomy to ensure haemostatis, which revealed amyloidosis on histological examination.