Inclusion body myositis

What is Inclusion body myositis?

A rare degenerative inflammatory disorder of skeletal muscles characterized by late onset weakness, starting in either the quadriceps or finger flexors and slowly progressing to include other groups of limb muscles. Distinctive histopathological features include inflammatory and degenerative features.

Other condition names

  • IBM
  • Sporadic inclusion body myositis
  • sIBM

Inheritance type

Not applicable

Prevalence

  • Europe: 1-9 in 1,000 000
  • United States: 1-9 in 100,000

Age of Onset

  • Adult
  • Elderly
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