Terra Firma-Forme Dermatosis Misdiagnosed as Nevoid Acanthosis Nigricans

Abstract:Terra firma-forme dermatosis (TFFD) is a clinical condition characterized by brown–gray, velvety, pigmented patches or plaques, resembling dirt on the skin. Nevoid acanthosis nigricans (NAN) is a rare and recently described form of acanthosis nigricans occurring during childhood or early ad