Urothelial Carcinoma In Situ

**Semantic type:** Neoplastic Process

**Definition:** A neoplastic lesion in which the urothelium of the bladder, renal pelvis and/or ureter displays cells with malignant cytological characteristics and abnormal architectural features without evidence of stromal invasion.

**Synonyms:** - Transitional Cell Carcinoma In Situ - Transitional cell carcinoma in situ