Eccrine hidrocystoma: a rare ophthalmic entity

Eyelid tumors are the most common neoplasm in routine ophthalmology practice and encompass a widevariety of benign and malignant tumors, predominant being benign tumors. Hidrocystomas are rare, benign,cystic lesions of the skin often found on the head and neck region and typically occurs on the face inadults between 30 and 70 years of age. They are further divided into two groups - apocrine and eccrinehidrocystoma; both closely mimic clinically and morphologically related cystic sweat gland tumors. Wepresent a “classic” case of eccrine hidrocystoma in a 60 year old female. The cysts are small, clear to blueand size ranging 1 to 6 mm in diameter. Histologically, the cysts are simple and lined by a 2 - 3 wall layersof cuboidal epithelium (non keratinizing), devoid of a myoepithelial layer. Eccrine lobules are often closelyapposed, and occasionally the ducts enter the cysts. Immunohistochemically, they stain positive for S100protein. Management of hidrocystomas mainly involves simple needle puncture with excision en mass.However, other treatment modalities are also available.Keywords: Eccrine, Eyelid, Histopatholoy, Hidrocystoma.