Eccrine angiomatous hamartoma: a case report and review of the literature.

Eccrine angiomatous hamartoma (EAH) is a rare, benign condition recognized histologically by increased numbers of eccrine elements, as well as numerous vascular channels. Patients typically present with a solitary, sometimes enlarging, nodule of the extremities usually appearing at birth or arising during childhood. When symptomatic, EAH may be associated with hyperhidrosis or pain. We report a case of EAH on the calf of a young girl; review all other known documented cases in the literature; and summarize the clinical characteristics, histologic findings, and prognosis of this uncommon entity.