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[Renal involvement by AA amyloidosis in inclusion body myositis]

C Díaz Rodríguez1, A Moreno Fernández, F Sacristán

  • 1Servicio de Nefroloía, F.P Hospital Virxe da Xunqueira, España. candido.diaz.rodriguez@sergas.es

Nefrologia : Publicacion Oficial De La Sociedad Espanola Nefrologia
|November 30, 2007
PubMed

Insights

Inclusion body myositis, a rare inflammatory myopathy, can lead to AA amyloidosis affecting the kidneys. This case highlights the importance of renal biopsy in patients with long-standing rheumatologic disease and declining kidney function.

Area of Science:

  • Rheumatology
  • Nephrology
  • Pathology

Background:

  • Inclusion body myositis (IBM) is an adult inflammatory myopathy with insidious onset, often affecting both proximal and distal muscles.
  • AA amyloidosis, linked to chronic rheumatic diseases, primarily impacts the kidneys.

Observation:

  • A case of a woman with Inclusion body myositis and concurrent renal AA amyloidosis is presented.
  • Literature review revealed no prior reports linking AA amyloidosis with adult idiopathic inflammatory myopathies.

Findings:

  • This represents the first reported case of AA amyloidosis associated with Inclusion body myositis.
  • The poor prognosis of IBM may contribute to the rarity of this association.

Implications:

  • Renal biopsy is recommended for patients with chronic rheumatologic conditions and unexplained renal impairment.
  • Early diagnosis and management of renal involvement in IBM could potentially improve patient outcomes.

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