A Rare Case of a Plasmacytoid and Sarcomatoid Differentiated Urothelial Bladder Carcinoma with a Single Metastasis to the Right Ventricle of the Heart and Rapid Review of Single Heart Metastasis in Bladder Cancer

These findings underline the aggressiveness of the variant histologies in NMIBC, especially plasmacytoid differentiation, and may favor an early and aggressive treatment regimen. Further scientific research concerning the optimal treatment of histologically variant bladder cancer is absolutely needed.