title: Juvenile xanthogranuloma of the lacrimal sac fossa.
abstract: OBJECTIVE
  Masses involving the medial canthus and lacrimal sac fossa include dacryocystoceles and, less commonly, mucoceles, hemangiomas, diverticula, and lacrimal sac neoplasms. To our knowledge, juvenile xanthogranuloma presenting as a lacrimal sac fossa mass has not been previously reported.
  
  
  METHODS
  We examined a 2-year-old boy who had epiphora in the left eye since birth and a mass in the left lacrimal sac fossa for 6 weeks. During surgery, left lacrimal probing disclosed obstruction at the level of the common canaliculus and lacrimal sac. Exploration and excision of the mass were performed.
  
  
  RESULTS
  Histopathologic evaluation disclosed a juvenile xanthogranuloma characterized by an inflammatory cell infiltrate with foamy histiocytes and scattered Touton-type multinucleated giant cells.
  
  
  CONCLUSIONS
  Juvenile xanthogranuloma should be included in the differential diagnosis of a medial canthal and lacrimal sac fossa mass.
authors.affiliation: Lions Eye Institute, Division of Oculoplastic and Orbital Surgery, Albany Medical College, NY 12208, USA.
authors.forename: P
authors.initials: P
authors.lastname: Mruthyunjaya
authors.forename: D R
authors.initials: DR
authors.lastname: Meyer
mesh_terms: D002675:Child, Preschool; D003560:Cysts / Q000175:diagnosis; D003607:Dacryocystitis / Q000175:diagnosis; D003937:Diagnosis, Differential; D005134:Eye Neoplasms / Q000175:diagnosis; D006801:Humans; D007766:Lacrimal Apparatus Diseases / Q000175:diagnosis* / Q000209:etiology / Q000601:surgery; D007767:Lacrimal Duct Obstruction / Q000175:diagnosis; D008297:Male; D014972:Xanthogranuloma, Juvenile / Q000175:diagnosis* / Q000209:etiology / Q000601:surgery