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Masticatory Myositis

March 12th, 2020

When presented with a possible case of masticatory myositis, it is important to remember there are two potential presentation types: acute and chronic forms.

Clinical signs associated with the acute form include:

  • Fever
  • Regional lymphadenopathy
  • Muscles of mastication swelling which are painful on palpation
  • Exophthalmos
  • Resists or unable to open the mouth

Clinical signs associated with the chronic form include:

  • Atrophy of the masticatory muscles
  • Muscle swelling/atrophy can be asymmetric
  • Enophthalmos
  • Inability to open mouth fully