Hidrocystomas--a brief review.

Hidrocystomas, eccrine and apocrine, are rare cystic lesions that form benign tumors of the sweat glands. In this clinical review, we present a "classic" case of hidrocystoma and review the main epidemiologic, histologic, and clinical features. We also review the effectiveness of experimental treatment methods and present information about associated syndromes and differential diagnosis, focusing especially on hidrocystomas' resemblance to basal cell carcinoma.