Eosinophilic granuloma of the eyelid.

A 15-year-old girl presented with a left lower eyelid tumor consistent with a nonresolving chalazion. The specimen was biopsied. Histopathologic examination revealed eosinophilic granuloma, an entity that rarely presents on the eyelid. The histopathologic features of eosinophilic granuloma--a member of the histiocytosis X group of diseases--are reviewed. Our patient responded well to incisional biopsy and has required no additional treatment.