title: Hemangiopericytoma of the inner canthus.
abstract: OBJECTIVE
  A 31-year-old woman with a mass at the left inner canthus was referred to our hospital.
  
  
  METHODS
  Clinical examination failed to establish a diagnosis and the patient underwent an incisional biopsy.
  
  
  RESULTS
  Histopathologic examination disclosed a hemangiopericytoma.
  
  
  CONCLUSIONS
  Because the behavior of a hemangiopericytoma is unpredictable, this tumor should be included when making a differential diagnosis in lesions of the inner canthus.
authors.affiliation: Department of Ophthalmology, University of Bonn, Germany.
authors.forename: W
authors.initials: W
authors.lastname: Sekundo
authors.forename: P
authors.initials: P
authors.lastname: Roggenkämper
authors.forename: K
authors.initials: K
authors.lastname: Tschubel
authors.forename: H P
authors.initials: HP
authors.lastname: Fischer
mesh_terms: D000328:Adult; D018952:Antigens, CD34 / Q000032:analysis; D001706:Biopsy; D003937:Diagnosis, Differential; D005142:Eyelid Neoplasms / Q000737:chemistry / Q000473:pathology*; D005260:Female; D006393:Hemangiopericytoma / Q000737:chemistry / Q000473:pathology*; D006801:Humans; D007150:Immunohistochemistry; D009418:S100 Proteins / Q000032:analysis; D014746:Vimentin / Q000032:analysis
chemical_list: D018952:Antigens, CD34; D009418:S100 Proteins; D014746:Vimentin