How is aplasia cutis congenita (ACC) classified?

Updated: Jun 17, 2020
  • Author: Chris G Adigun, MD, FAAD; Chief Editor: William D James, MD  more...
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Frieden [1] created a classification system for aplasia cutis congenita consisting of 9 groups based on the number and location of the lesions and the presence or absence of associated malformations:

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