RT Book, Section A1 Usatine, Richard P. A1 Smith, Mindy A. A1 Chumley, Heidi S. A1 Mayeaux, E.J. SR Print(0) ID 57685193 T1 Chapter 220. Acanthosis Nigricans T2 The Color Atlas of Family Medicine, 2e YR 2013 FD 2013 PB The McGraw-Hill Companies PP New York, NY SN 978-0-07-176964-8 LK accessmedicine.mhmedical.com/content.aspx?aid=57685193 RD 2024/04/16 AB An adolescent girl with obesity and recently diagnosed type II diabetes mellitus (DM) presents to her family physician with concerns about a “dirty area” under her arms and on her neck that “couldn't be cleaned” (Figure 220-1). She has irregular periods that often skip several months at a time. The physician makes the diagnosis of acanthosis nigricans.