Incidental epidermolytic hyperkeratosis in progressive systemic sclerosis.

Incidental epidermolytic hyperkeratosis (EH) has been reported in a variety of lesions. We describe here incidental EH in a patient with progressive systemic sclerosis (PSS). We reviewed 108 skin biopsies from our cases of PSS and localized scleroderma, but this finding was seen only in the present case. Focal acantholytic dyskeratosis is analogous to EH, but we believe that this case is most consonant with EH. Since there has been no other report of EH in PSS, this association may be coincidental.