Hidrocystoma
Hidrocystoma is an adenoma of the sweat glands.
Hidrocystomas are cysts of sweat ducts, usually on the eyelids. They are not tumours.
There are three types of "sweat" glands: True sweat glands or eccrine glands;
sebaceous glands, which have an oily secretion around hair follicles; and apocrine glands which have more oily product than eccrine glands and are found on the face, armpit, and groin.
Hidrocystomas usually arise from apocrine glands. They are also called Cysts of Moll or sudoriferous cysts. There may be a type of hidroadenoma that arises from eccrine glands, but these are uncommon.
Other related conditions on the eyelids include chalazion, lacrimal duct cysts and nasolacrimal duct cysts.Additional images
