title: Eyelid phakomatous choristoma.
abstract: OBJECTIVE
  To report a case of congenital phakomatous choristoma (PC) of the eyelid, a rare tumor of lenticular anlage in the subcutaneous tissue and dermis.
  
  
  METHODS
  A boy had a mass in the right lower eyelid near the inner canthus at birth. At age 10 months, the tumor was excised.
  
  
  RESULTS
  The tumor cells showed intense immunoreactivity positive for S-100 protein, vimentin, and periodic acid-Schiff. Keratin markers, epithelial membrane antigen, glial fibrillary acidic protein, muscle specific actin, and epithelial membrane antigen were negative. The histopathologic features were consistent with those of a PC.
  
  
  CONCLUSIONS
  This histopathologic and immunoreactivity study supports the proposal that PC is a rare entity of lenticular anlage origin. Only 18 such cases have been described previously.
authors.affiliation: Department of Ophthalmology, Octubre Hospital, Complutense University, Madrid, Spain. emencia.hdoc@salud.madrid.org
authors.forename: E
authors.initials: E
authors.lastname: Mencía-Gutiérrez
authors.forename: E
authors.initials: E
authors.lastname: Gutiérrez-Díaz
authors.forename: J R
authors.initials: JR
authors.lastname: Ricoy
authors.forename: B
authors.initials: B
authors.lastname: Sarmiento-Torres
mesh_terms: D015415:Biomarkers / Q000032:analysis; D002828:Choristoma / Q000378:metabolism / Q000473:pathology* / Q000601:surgery; D005136:Eye Proteins / Q000378:metabolism; D005141:Eyelid Diseases / Q000378:metabolism / Q000473:pathology* / Q000601:surgery; D006801:Humans; D007231:Infant, Newborn; D007908:Lens, Crystalline; D008297:Male
chemical_list: D015415:Biomarkers; D005136:Eye Proteins