Squamous carcinoma of urinary bladder.

The clinical course of 56 patients with squamous cell carcinoma of the urinary bladder and poorly differentiated transitional cell carcinoma with squamous metaplasia were compared. Survival was evaluated to compare treatments and biologic potentials of these neoplasms. Squamous cell carcinoma of the urinary bladder behaves as poorly differentiated transitional cell carcinoma with squamous metaplasia, and survival is significantly poorer than in poorly differentiated transitional cell carcinoma. While survivals are limited, only radical, surgical extirpation can be associated with significant patient salvage.