[Black hidrocystoma of the free margin of the eyelid].

A clinico-pathologic case of a black hidrocystoma of the left eyelid margin is reported in a 45-year-old female patient. Clinically, a black nodule was disclosed after eversion of the superior left lid. A surgical full thickness eyelid focal resection was performed to remove the cyst. Histopathology found a cyst covered with an epithelium with a double layer of cells and filled with a brownish granular content, typical of a black hidrocystoma.