Isolated dyskeratotic acanthoma. A variant of isolated epidermolytic acanthoma

Disorders affecting the maturation of the epidermis are regarded as incidental findings in normal skin and otherwise unrelated benign lesions. These include epidermolytic hyperkeratosis, focal acantholytic dyskeratosis, and pagetoid dyskeratosis. The former two entities also occur as primary pathologic lesions. We report a hyperkeratotic lesion with a specific histologic pattern consisting of dyskeratotic cells throughout the epidermis and a parakeratotic horn, with large, rounded cells at all levels of the stratum corneum. Because we believe it to be a variant of the solitary, acquired lesions characterized by abnormal epidermal maturation, such as epidermolytic acanthomas, we suggest the term "dyskeratotic acanthoma" for this lesion.