Hidrocystomas are rare, benign, watery or fluid filled cystic proliferations of the skin.  There are Apocrine and Eccrine sources of Hidrocystomas (EH).  Apocrine Hidrocystomas are cysts that often have multiple locations and demonstrate Apocrine differentiation on histology.  EH are more likely to be unilocular and are comprised of dilated sweat glands or ducts rather than… Read more »