Acanthosis Nigricans Differential Diagnoses

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Jason H Miller, MD Clinical Assistant Professor of Dermatology, Rutgers Robert Wood Johnson Medical School; Private Practice, Hametz and Picascia Dermatology Associates

Jason H Miller, MD is a member of the following medical societies: Alpha Omega Alpha, American Academy of Dermatology, American Medical Association, American Society for Dermatologic Surgery, Society for Pediatric Dermatology

Disclosure: Nothing to disclose.

Frank Winsett, MD University of Texas Health Science Center at Houston

Disclosure: Nothing to disclose.

Ronald P Rapini, MD Professor and Chair, Department of Dermatology, The University of Texas MD Anderson Cancer Center; Distinguished Chernosky Professor and Chair of Dermatology, Professor of Pathology, University of Texas McGovern Medical School at Houston

Ronald P Rapini, MD is a member of the following medical societies: American Academy of Dermatology, American Dermatological Association, American Medical Association, American Society for Dermatologic Surgery, American Society for MOHS Surgery, American Society of Dermatopathology, Association of Professors of Dermatology, Society for Investigative Dermatology, Texas Dermatological Society

Disclosure: Book royalties from Elsevier publishers.

Michael J Wells, MD, FAAD Dermatologic/Mohs Surgeon, The Surgery Center at Plano Dermatology

Michael J Wells, MD, FAAD is a member of the following medical societies: Alpha Omega Alpha, American Academy of Dermatology, American Medical Association, Texas Medical Association

Disclosure: Nothing to disclose.

Edward F Chan, MD Clinical Assistant Professor, Department of Dermatology, University of Pennsylvania School of Medicine

Edward F Chan, MD is a member of the following medical societies: American Academy of Dermatology, American Society of Dermatopathology, Society for Investigative Dermatology

Disclosure: Nothing to disclose.

William D James, MD Paul R Gross Professor of Dermatology, Vice-Chairman, Residency Program Director, Department of Dermatology, University of Pennsylvania School of Medicine

William D James, MD is a member of the following medical societies: American Academy of Dermatology, Society for Investigative Dermatology

Disclosure: Received income in an amount equal to or greater than $250 from: Elsevier; WebMD<br/>Served as a speaker for various universities, dermatology societies, and dermatology departments.

Ponciano D Cruz, Jr, MD Professor and Vice-Chair, Paul R Bergstresser Chair, Department of Dermatology, University of Texas Southwestern Medical Center

Ponciano D Cruz, Jr, MD is a member of the following medical societies: Texas Medical Association

Disclosure: Received consulting fee from RCTS for independent contractor; Received honoraria from Mary Kay Cosmetics for consulting; Received grant/research funds from Galderma for principal investigator.

The authors and editors of Medscape Reference gratefully acknowledge the contributions of previous authors, Jonathan Baron, MD, and Norman Levine, MD, to the development and writing of this article.

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