Appendix Intraepithelial Neoplasia

**Semantic type:** Neoplastic Process

**Definition:** A precancerous intraepithelial neoplastic lesion that affects the appendix. It is characterized by low or high grade dysplasia of the mucosal epithelium. There is no evidence of invasion.

**Synonyms:** - Appendiceal Dysplasia - Appendix Dysplasia