title: Nephrotic syndrome and kidney failure due to immunocomplex-mediated renal damage in a patient with Waldenström's Macroglobulinemia: a case report.
abstract: BACKGROUND
  Unlike the quite frequent renal involvement seen in cases of Multiple Myeloma, the kidney is hardly ever compromised in patients with Waldenström's Macroglobulinemia. Nephrotic range proteinuria is a very unusual manifestation of renal injury in these patients and when present it is due to amyloid light-chain deposition most of the times.
  
  
  METHODS
  A 60-year-old male patient presented to the hospital with nephrotic syndrome, renal insufficiency, hypertension and lymphadenopathy. The investigations led to the diagnosis of Waldenström's Macroglobulinemia with associated nephrotic syndrome and chronic kidney disease due to an unusual form of hypocomplementemic glomerulopathy with histopathological features similar to those seen in mesangiocapillary glomerulonephritis type III, but lacking proliferative changes.
  
  
  CONCLUSIONS
  We present an unusual case of immunologically-mediated renal damage in a patient with Waldenström's Macroglobulinemia, leading to non-amyloid nephrotic syndrome and chronic renal insufficiency.
authors.affiliation: Department of Medicine, Division of General Internal Medicine, University of Miami/Jackson Memorial Medical Center, Miami, Florida, USA. hcastro2@med.miami.edu.
authors.forename: Hector
authors.initials: H
authors.lastname: Castro
authors.forename: Rafael
authors.initials: R
authors.lastname: Valenzuela
authors.forename: Phillip
authors.initials: P
authors.lastname: Ruiz
authors.forename: Oliver
authors.initials: O
authors.lastname: Lenz
authors.forename: Mauricio
authors.initials: M
authors.lastname: Monrroy