Mullerianosis involving the urinary bladder

We report a case of mullerianosis involving the urinary bladder. A 45-year-old woman presented with complaints of chronic pelvic pain, dysmenorrhoea, irritative lower urinary tract symptoms and cyclical haematuria. Cystoscopy and transurethral biopsy suggested mullerianosis involving the posterior bladder wall; she subsequently had surgery including partial cystectomy with complete excision of the lesion. Histology reported presence of endometrial, endocervical and endosalpingeal tissues within the bladder mass confirming mullerianosis. She made satisfactory postoperative recovery. Awareness of this lesion is necessary for proper diagnosis and appropriate treatment.