Histological study of eyelid hidrocystoma: A clinical case.

Hidrocystomas are benign lesions with frequent localization on the eyelids and common appearance as isolated translucent cystic lesions. The multiple and bilateral localization has been associated with systemic diseases or epidermodysplasia. The histological and ultrastructural study contributes to the distinction in eccrine or apocrine. In this clinical case, multiple bilateral skin lesions of the eyelids were removed surgically from a 55-year-old male patient with free medical history. The lesions were fully removed surgically without rupture of the cysts. The obtained tissues were fixed and prepared for an anatomical pathology study as well as observation under the electron microscope. The histological study revealed cystic lesions with low cuboid epithelium and presence of cells and collagen fibrils, while the ultrastructural study also revealed the presence of apoptotic and secretory cells as well as vacuolization of the cytoplasm. No relapse of the lesions was obtained. In conclusion, the histological and ultrastructural study of multiple hidrocystomas can highlight special features that help to better classify and diagnose eccrine or apocrine hidrocystomas, while surgical removal without rupture of the cyst can prevent reappearance.