Cystitis cystica is a rare benign proliferative lesion of the bladder, caused by hyperplasia of the bladder submucosa, usually as a response to chronic irritation. It is considered to be premalignant, leading to adenocarcinoma of the bladder. Though cystitis cystica occurs mainly at the bladder neck and trigone region of the bladder, we report a case of cystitis cystica causing bilateral ureteric obstruction and loin pain.
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