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A and B, Eccrine hydrocystomas. Histologic examination found several thin-walled cysts predominantly composed of 2 layers of small, cuboidal epithelial cells in the mid- and reticular dermis, consistent with eccrine hidrocystomas. Step sectioning of the lesion found a consistent eccrine appearance with no apocrine differentiation. (Hematoxylin-eosin stain; original magnifications: A, ×2; B, ×10.)
