title: Multiple calcified primary central nervous system lymphoma with immunodeficiency in a child.
abstract: BACKGROUND
  Multiple calcified primary central nervous system lymphoma (PCNSL) is extremely rare in childhood.
  
  
  METHODS
  We report a 4-year-old boy suffering from multiple calcified B-cell lymphoma in the brain with immunodeficiency.
  
  
  RESULTS
  The boy had a history of walking weakness and seizure for 4 months. The serum levels of immunoglobulin G, A and M were decreased. Brain MRI showed multiple lesions which had ring enhancement. CT showed calcification in all of the lesions. The boy was firstly misdiagnosed with multiple chronic brain abscesses. Pathological analysis of biopsy confirmed the diagnosis of anaplastic diffuse large B-cell lymphoma.
  
  
  CONCLUSIONS
  PCNSL should be included in the differential diagnosis of intracranial mass with calcification.
authors.affiliation: Department of Radiology, East Hospital, Tongji University School of Medicine, Shanghai, 200120, China.
authors.forename: Jing-Qi
authors.initials: JQ
authors.lastname: Zhu
authors.forename: Nan-Xin
authors.initials: NX
authors.lastname: Hao
authors.forename: Wei-Qun
authors.initials: WQ
authors.lastname: Bao
authors.forename: Xiang-Ru
authors.initials: XR
authors.lastname: Wu
mesh_terms: D001932:Brain Neoplasms / Q000150:complications / Q000175:diagnosis*; D002114:Calcinosis / Q000150:complications; D006801:Humans; D007153:Immunologic Deficiency Syndromes / Q000150:complications; D007223:Infant; D017728:Lymphoma, Large-Cell, Anaplastic / Q000150:complications / Q000175:diagnosis*; D008297:Male