Appendix Carcinoma pT4a TNM Finding v9

**Semantic type:** Finding

**Definition:** Appendix carcinoma with tumor invading the visceral peritoneum, including acellular mucin or mucinous epithelium involving the serosa of the appendix or serosa of the mesoappendix. (from AJCC 9th Ed.)

**Synonyms:** - Appendiceal Carcinoma pT4a TNM Finding v9