Non-Invasive Papillary Urothelial Carcinoma, High Grade

**Semantic type:** Neoplastic Process

**Definition:** A non-invasive papillary urothelial carcinoma characterized by marked architectural and cytologic abnormalities and frequent mitotic figures (at all levels of the urothelium). It usually occurs in the urinary bladder, but it can arise from other sites in the urinary tract.

**Synonyms:** - Non-Invasive Papillary Urothelial Carcinoma, High-Grade