title: Adult onset Langerhans cell histiocytosis of the orbit--a case report.
abstract: OBJECTIVE
  To report an interesting case of adult onset Langerhans cell histiocytosis in a 41-year-old male with clinicopathological correlation.
  
  
  METHODS
  Interventional case report.
  
  
  METHODS
  A 41-year-old male presented with an ill-defined mass occupying the temporal quadrant of the left orbit. Computerized tomography revealed an ill-defined extraconal mass involving the superolateral aspect of the left orbit with areas of osteolysis involving the lateral and superior orbital walls. The mass excised at orbitotomy showed microscopic features consistent with Langerhans cell histiocytosis. Immunohistochemistry with CD-68 macrophage marker and S-100 was positive, confirming the diagnosis. Treatment included oral steroids and radiotherapy. At 6 months follow-up, he developed a punched-out lytic lesion in the left parietal calvarium. He again received external beam radiotherapy. At 14 months follow-up, he is doing well with no recurrences.
  
  
  CONCLUSIONS
  Adult onset Langerhans cell histiocytosis, though rare, should be included in the differential diagnosis of lytic lesions of the lateral orbital wall in an adult patient.
authors.affiliation: Medical and Vision Research Foundation,s Sankara Nethralaya, Chennai, India.
authors.forename: Nirmala
authors.initials: N
authors.lastname: Subramanian
authors.forename: Subramanian
authors.initials: S
authors.lastname: Krishnakumar
authors.forename: Kalpana
authors.initials: K
authors.lastname: Babu
authors.forename: Ravindra
authors.initials: R
authors.lastname: Mohan
authors.forename: K S
authors.initials: KS
authors.lastname: Lakshmi
authors.forename: Jyotirmay
authors.initials: J
authors.lastname: Biswas
mesh_terms: D000328:Adult; D015703:Antigens, CD / Q000378:metabolism; D015214:Antigens, Differentiation, Myelomonocytic / Q000378:metabolism; D003131:Combined Modality Therapy; D003937:Diagnosis, Differential; D005938:Glucocorticoids / Q000627:therapeutic use; D006646:Histiocytosis, Langerhans-Cell / Q000000981:diagnostic imaging / Q000378:metabolism / Q000473:pathology* / Q000628:therapy; D006801:Humans; D007150:Immunohistochemistry; D008297:Male; D009916:Orbital Diseases / Q000000981:diagnostic imaging / Q000378:metabolism / Q000473:pathology* / Q000628:therapy; D018714:Radiotherapy, Adjuvant; D009418:S100 Proteins / Q000378:metabolism; D014057:Tomography, X-Ray Computed; D000097382:CD68 Molecule
chemical_list: D015703:Antigens, CD; D015214:Antigens, Differentiation, Myelomonocytic; D005938:Glucocorticoids; D009418:S100 Proteins; C067980:CD68 antigen, human; D000097382:CD68 Molecule