title: Burkitt lymphoma manifesting as acute proptosis.
abstract: OBJECTIVE
  To describe an unusual case of Burkitt lymphoma manifesting as acute proptosis and simulating orbital inflammatory disease.
  
  
  METHODS
  Case report.
  
  
  RESULTS
  A 24-year-old Chinese man developed painful severe nonaxial proptosis in his left eye during 1 day. Computed tomographic scan disclosed an orbital mass that was shown to be Burkitt lymphoma when biopsy was performed. The disease progressed rapidly despite chemotherapy.
  
  
  CONCLUSIONS
  Our case supports the fact that Burkitt lymphoma can manifest as acute proptosis and expands the spectrum of clinical presentation of Burkitt lymphoma.
authors.affiliation: Department of Ophthalmology, Tan Tock Seng Hospital, Singapore.
authors.forename: K G
authors.initials: KG
authors.lastname: Au Eong
authors.forename: C T
authors.initials: CT
authors.lastname: Choo
mesh_terms: D000208:Acute Disease; D000328:Adult; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000627:therapeutic use; D001706:Biopsy; D002051:Burkitt Lymphoma / Q000175:diagnosis* / Q000628:therapy; D003520:Cyclophosphamide / Q000627:therapeutic use; D004317:Doxorubicin / Q000627:therapeutic use; D005094:Exophthalmos / Q000175:diagnosis*; D017809:Fatal Outcome; D005938:Glucocorticoids / Q000627:therapeutic use; D006801:Humans; D008297:Male; D009918:Orbital Neoplasms / Q000175:diagnosis* / Q000628:therapy; D011239:Prednisolone / Q000031:analogs & derivatives / Q000627:therapeutic use; D018714:Radiotherapy, Adjuvant; D014057:Tomography, X-Ray Computed; D014750:Vincristine / Q000627:therapeutic use
chemical_list: D005938:Glucocorticoids; D014750:Vincristine; D004317:Doxorubicin; C009935:prednisolone acetate; D003520:Cyclophosphamide; D011239:Prednisolone