T4a TNM Finding

**Semantic type:** Finding

**Definition:** A general term that refers to a TNM finding of a primary tumor with direct invasion of adjacent structures. The definition of T4a TNM finding depends on the specific type of cancer that it refers to; for example, for bladder cancer it refers to a primary tumor that invades the prostatic stroma, uterus, and vagina; for gastric cancer it refers to a primary tumor that invades the serosa (visceral peritoneum); for colorectal cancer it refers to a primary tumor that penetrates to the surface of the visceral peritoneum.

**Synonyms:** - T4a - T4a - T4a Primary Tumor Finding - T4a Stage Finding - T4a Tumor Finding