Abstract
A 56-year-old man had an 11-year history of a psoriasiform eruption of the palms, soles, and shins. An examination revealed well-demarcated patches and plaques of erythematous, fissured, and hyperkeratotic skin with focal erosions. There was no clinical evidence of ectodermal dysplasia. On histologic examination these lesions proved to be eccrine hamartomas that consisted of anastomosing cords and strands of cuboidal epithelial cells with well-formed ducts and a fibrovascular mucinous stroma. Eccrine ductal origin was indicated by histopathologic, histochemical, immunopathologic, and electron microscopic evaluation. These multiple palmoplantar eccrine hamartomas, unassociated with ectodermal dysplasia, represent a sporadic hamartomatous condition that is best designated as “eccrine syringofibroadenomatosis”.
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