disease has location colon adenoma adenoma appendix adenoma appendix adenoma EFO:1000089 A circumscribed neoplasm arising from the glandular epithelium of the appendix. Morphologically, it is characterized by a proliferation of neoplastic glandular cells and it is associated with dysplasia. According to the growth pattern, it may be classified as tubular, villous, or tubulovillous. The dysplasia is classified as mild, moderate, or severe. NCIT:C43550 MEDGEN:312900 UMLS:C1706829 MONDO:0006088 vermiform appendix adenoma GARD:0024287 epithelial tumor of the appendix vermiform appendix