precancerous condition UMLS:C0032927 MEDGEN:19442 Editor note: check classification. Also consider changing def, NCIT defines as disease. Also consider a grouping for this and paraneoplastic syndrome premalignant condition precancerous condition NCIT:C3341 MESH:D011230 precancerous state MONDO:0021074 premalignant state A pathological process with signs indicating it may become cancerous. Representative examples include leukoplakia, dysplastic nevus, actinic keratosis, xeroderma pigmentosum, and intraepithelial neoplasia. cancer or benign tumor