Appendiceal Carcinoma pTis TNM Finding v7

**Semantic type:** Finding

**Definition:** Appendiceal carcinoma with a finding of carcinoma in situ: intraepithelial or invasion of the lamina propria. Tis includes cancer cells confined within the glandular basement membrane (intraepithelial) or lamina propria (intramucosal) with no extension through muscularis mucosae into submucosa. (from AJCC 7th Ed.)