Dyskeratotic degeneration of epidermal cells in pityriasis rosea: light and electron microscopic studies

Abstract
We studied biopsies from twenty‐nine patients with pityriasis rosea. All specimens showed features of subacute or chronic dermatitis as previously reported, but sixteen cases (55%) had dyskeratotic cells within the epidermis. Ultrastructurally, these cells contained an aggregation of tonofilaments, many vacuoles and intracytoplasmic desmosomes. Previously, only non‐speci fic histological changes had been described in pityriasis rosea, but the presence of dyskeratotic cells seems to be a significant feature.

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