Two balloon cell nevi of the conjunctiva. case reports with light and electron microscopy

Case Reports: Two 19-year-old patients presented with small nasal conjuncti val tumors. Histologic examination revealed subepithelial tumors consisting of large cells with deeply basophilic, small, centrally-placed nuclei and abundant, slightly eosinophilic cytoplasm with microvesicles. Electron micr oscopy showed premelanosomes in some of the balloon cells. Conclusion: The balloon cell nevus is a rare variant of the conjunctival ne vi. The characteristic intracellular microvesicles are probably degenerativ e remnants of premelanosomes.