Fibrous dysplasia-like tumor of the lacrimal sac.

A 75-year-old woman developed epiphora and a slowly enlarging right medial canthal mass for 1 year. CT revealed a mass with ground-glass radiodensity and hazy borders in the lacrimal sac. At external dacryocystorhinostomy, a tan, gritty, spherical mass was easily removed from the sac lumen. Histopathologic characteristics were typical of fibrous dysplasia. The postoperative course was uneventful.