Experimental Factor Ontology identifier EFO_1001503 (type II diabetes mellitus with acanthosis nigricans) is acanthosis nigricans (AN) in type 2 diabetes mellitus (T2DM). Also known as: Diabetes Mellitus, Insulin-Resistant, with Acanthosis Nigricans, Type A, IRAN, Type A, Insulin Receptor Defect with Insulin-Resistant Diabetes Mellitus and Acanthosis Nigricans, Insulin-resistant diabetes mellitus AND acanthosis nigricans, Type 2 diabetes mellitus with acanthosis nigricans, Type 2 diabetes mellitus with acanthosis nigricans (disorder), insulin-resistant diabetes mellitus and acanthosis nigricans, type 2 diabetes mellitus with acanthosis nigricans.