Incidental granular parakeratosis associated with dermatomyositis.
A 43-year-old patient presented with a 4-month history of intermittently occurring symmetrical and slightly scaling erythematous plaques in his zygomatic regions. Because of polymyositis in the patient's history, the skin lesions were thought to be a manifestation of dermatomyositis. The skin biopsy revealed a sparse superficial perivascular infiltrate of lymphocytes, which was associated with telangiectases and both discrete vacuolar alteration and smudging of the dermal-epidermal junction. These findings were consonant with dermatomyositis. In addition to these features focal granular parakeratosis was present. The histopathologic presence of granular parakeratotic corneocytes above a zone of orthokeratosis and the absence of clinical features of granular parakeratosis indicate the granular parakeratosis is incidental.
Pock
Lumír
L
Dermatopathologic Laboratory, Prague, Czech Republic. lumir.pock@volny.cz
Hercogová
Jana
J
D000328:Adult; D003882:Dermatomyositis / Q000150:complications* / Q000473:pathology; D020405:Dermis / Q000473:pathology; D004817:Epidermis / Q000473:pathology; D005148:Facial Dermatoses / Q000150:complications* / Q000473:pathology; D006801:Humans; D008214:Lymphocytes / Q000473:pathology; D008297:Male; D010241:Parakeratosis / Q000150:complications* / Q000473:pathology; D013684:Telangiectasis / Q000473:pathology