How is acanthosis nigricans staged in women with polycystic ovarian syndrome (PCOS)?

Updated: Sep 19, 2019
  • Author: Richard Scott Lucidi, MD, FACOG; Chief Editor: Richard Scott Lucidi, MD, FACOG  more...
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Acanthosis nigricans is staged according to the scoring system below:

  • Absent (0): Not detectable on close inspection

  • Present (1): Clearly present on close visual inspection, not visible to the casual observer, extent not measurable

  • Mild (2): Limited to the base of the skull, usually does not extend to the lateral margins of the neck

  • Moderate (3): Extends to the lateral margins of the neck but not visible anteriorly

  • Severe (4): Visible anteriorly

  • Severe (5): Circumferential

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