title: An unusual case of glomerulonephritis in a patient with non-Hodgkin mucosal associated lymphoid tissue (MALT) B-cell lymphoma.
abstract: BACKGROUND
  Kidney involvement in non-Hodgkin lymphoma is well recognized and glomerulonephritis, when present, has been commonly reported to be associated with a membranoproliferative pattern.
  
  
  METHODS
  We report a case of a 58-year-old lady with a recurrence of non-Hodgkin MALT B-cell lymphoma, presenting with acute kidney injury, nephrotic range proteinuria and a cellular urinalysis. She underwent a renal biopsy that showed a severe diffuse proliferative and exudative lupus-like glomerulonephritis, which is likely paraneoplastic in nature. We discuss the differential diagnosis and possible pathogenesis of glomerular injury in lymphoma-related proliferative glomerulonephritis.
  
  
  CONCLUSIONS
  Differentiating between true lupus nephritis and a paraneoplastic glomerulonephritis is important, as it would have significant implications on treatment and clinical course.
authors.affiliation: Department of Renal Medicine, Tan Tock Seng Hospital, Singapore, Singapore.
authors.forename: See Cheng
authors.initials: SC
authors.lastname: Yeo
authors.forename: Khoon Leong
authors.initials: KL
authors.lastname: Chuah
authors.forename: Hwei Yee
authors.initials: HY
authors.lastname: Lee
authors.forename: Adrian
authors.initials: A
authors.lastname: Liew
mesh_terms: D005260:Female; D005500:Follow-Up Studies; D005921:Glomerulonephritis / Q000150:complications* / Q000175:diagnosis*; D006801:Humans; D018442:Lymphoma, B-Cell, Marginal Zone / Q000150:complications* / Q000175:diagnosis*; D008875:Middle Aged