disease has location adenoma A neoplasm arising from the epithelium. It may be encapsulated or non-encapsulated but non-invasive. The neoplastic epithelial cells may or may not display cellular atypia or dysplasia. In the gastrointestinal tract, when dysplasia becomes severe it is sometimes called carcinoma in situ. Representative examples are pituitary gland adenoma, follicular adenoma of the thyroid gland, and adenomas (or adenomatous polyps) of the gastrointestinal tract. DOID:657 EFO:0000232 Editor note: check status re benign ICDO:8140/0 MESH:D000236 MONDO:0004972 NCIT:C2855 SCTID:443416007 UMLS:C0001430 acinar cell adenoma acinar cell adenoma (morphologic abnormality) acinic cell adenoma adenoma adenoma, benign adenomas epithelial neoplasm gland