Carcinosarcoma of the bladder is a very rare and aggressive tumor with poor prognosis. We report a case of a 61 year-old-male who presented a terminal hematuria. Ultrasounds revealed a mass at the dome and the right of urinary bladder. A transurethral resection of the bladder tumor was performed. A pathological examination revealed a pT1 hight grade carciono-sarcoma of the urinary bladder with cartilaginous differentiation. Cystoprostatectomy with Bricker diversion and lymph node dissection were performed. The pathological examination of the surgical specimen revealed no residual tumor lesion.

While bladder rupture is most of the time secondary to external injury such as trauma or iatrogenic events, spontaneous bladder rupture (SBR) is a rare condition which is mostly associated with bladder cancer, neurologic bladder or radiotherapy. We report a case of a 63-year-old patient with an invasive squamous cell bladder carcinoma who presented acute peritonitis caused by a SBR while being prepared for radical surgery. CT-scan helped to confirm diagnosis and emergency cystectomy was performed. SBR should be considered in differential diagnosis of peritonitis. On time diagnosis and adequate surgery could improve its prognosis.

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