Sarcomatoid Urothelial Carcinoma
Section Editor: Dharam M. Ramnani, MD
Virginia Urology, Richmond, VA, USA
Image Description
Sarcomatoid urothelial carcinomas may show heterologus differentiation consisting of rhabdomyosarcoma, osteosarcoma, chondrosarcoma (shown here), and other elements. In this image, the surface shows urothelial carcinoma-in-situ and the lamina propria shows low-grade chondrosarcoma. The differential diagnosis includes the isolated cases of urothelial carcinoma with benign metaplastic bone or cartilage in the stroma.