[Synchronous growth of a mixed mesodermal tumor and an adenocarcinoma of the urinary bladder]

The case of synchronous growth of a mesodermal mixed tumour and an adenocarcinoma in the bladder is presented. This is a rare phenomenon. Mesodermal mixed tumours are malignancies with both epithelial (carcinoma) and mesenchymal (sarcoma) differentiation. The term carcinosarcoma is frequently used in the literature. In most cases the prognosis of mesodermal mixed tumours, which depends mainly on the high rate of local recurrences, is poor. Therefore, cystectomy with suprapubic urinary diversion is the treatment of choice. However, results reported in the literature show that transurethral resection of the tumour may be adequate when there is only superficial growth of mesodermal mixed tumours. Short follow-up intervals are absolutely essential for patients treated this way.