Immunoglobulin heavy chain can be amyloidogenic: Morphologic characterization including immunoelectron microscopy

Hoa L. Mai, David Sheikh-Hamad, Guillermo A. Herrera, Xin Gu, Luan D. Truong

Research output: Contribution to journalArticle

34 Scopus citations

Abstract

It is not well recognized that monoclonal immunoglobulin heavy chains or their fragments can be amyloidogenic. Amyloidosis due to heavy chains, referred to as AH amyloidosis, is rare with only three cases previously reported. An additional case of AH amyloidosis is reported. To the best of our knowledge, this is the first case of IgM heavy chain amyloidosis. A 59-year-old man presented with nephrotic syndrome. Immunoelectrophoresis detected a monoclonal IgM lambda in his serum and free lambda light chains in his urine. A renal biopsy showed amyloidosis, in which the amyloid deposits stained only for mu heavy chain by immunofluorescent and immunoelectron microscopic studies. This case suggests that monoclonal immunoglobulin heavy chains can be amyloidogenic. Furthermore, this type of amyloidosis shares the same morphologic features with other types of amyloidosis and can involve the kidney to produce nephrotic syndrome.

Original languageEnglish (US)
Pages (from-to)541-545
Number of pages5
JournalAmerican Journal of Surgical Pathology
Volume27
Issue number4
DOIs
StatePublished - Apr 1 2003

Keywords

  • Amyloidosis
  • Kidney
  • Monoclonal immunoglobulin heavy chain
  • Nephrotic syndrome

ASJC Scopus subject areas

  • Anatomy
  • Pathology and Forensic Medicine

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