[Transitional cell carcinoma of the renal pelvis with various histological appearances: a case report].

A large left renal mass was removed from an 85-year-old male. Histological examination revealed various features: Anaplastic transitional cell carcinoma and glandular formation scattered with portions resembling cancer pearls. Sarcomatoid-like area at ureteral margin of the mass and carcinoma-in-situ at renal pelvic mucosa were also seen. Final interpretation was grade III, transitional cell carcinoma, with squamous and glandular differentiation, spindling, and pleomorphic areas.