title: [Characteristics of ocular adnexal non-Hodgkin lymphoma].
abstract: OBJECTIVE
  To investigate the clinical manifestation and pathological features of primary ocular adnexal non-Hodgkin lymphoma.
  
  
  METHODS
  Data of 18 patients with biopsy-proven ocular adnexal non-Hodgkin lymphoma at Xiangya hospital were reviewed.The disease site, clinical manifestation,imaging and pathological features of the tumor were summarized.
  
  
  RESULTS
  All patients had typical presentation of an adnexal mass.Twelve(66.7%) patients had orbital involvement, 3(16.7%) had conjunctival, and 3(16.7%) had lymphoma involving the eyelids.Eight patients were misdiagnosed as "inflammatory pseudotumour" before the operation according to their clinical and imaging examination,another 8 patients were diagnosed as "ocular adnexal tumour with unknown nature" before the operation. According to the pathologic diagnosis, 16 patients (88.9%)had marginal zone lymphomas of mucosa-associated lymphoid tissue(MZL-MALT) and 2 (11.1%) had NK/T-cell lymphoma.
  
  
  CONCLUSIONS
  The typical presentation of ocular adnexal lymphoma is a painless mass.Orbital connective tissue is the most involved anatomical site. The diagnosis of ocular adnexal non-Hodgkin lymphoma is difficult which could easily be misdiagnosed as "inflammatory pseudotumour". MZL-MALT is the most common pathologic type.
authors.affiliation: Department of Ophthalmology,Xiangya Hospital,Central South University, Changsha 410011, China.
authors.forename: Wen-shu
authors.initials: WS
authors.lastname: Yi
authors.forename: Xue-liang
authors.initials: XL
authors.lastname: Xu
authors.forename: Qian
authors.initials: Q
authors.lastname: Xiang
authors.forename: Hai-bo
authors.initials: HB
authors.lastname: Jiang
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D003937:Diagnosis, Differential; D005134:Eye Neoplasms / Q000175:diagnosis* / Q000473:pathology; D005260:Female; D006801:Humans; D008228:Lymphoma, Non-Hodgkin / Q000145:classification / Q000175:diagnosis* / Q000473:pathology; D008297:Male; D008875:Middle Aged; D009918:Orbital Neoplasms / Q000175:diagnosis* / Q000473:pathology