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Section: Overview
Masticatory muscle myositis (MMM) is an inflammatory condition involving the muscles of mastication or chewing in the dog. MMM is caused by an immune mediated process targeted against specific muscle fibers; the immune system attacks the body's own muscles. MMM occurs in all breeds of dog, but appears to be more common in German shepherds, Doberman pinschers and retrievers. Young and middle-aged dogs are most commonly affected. MMM has not been reported in the cat.The disease occurs in both acute (sudden) and chronic forms, and the signs may vary with each form. The chronic form is seen more commonly. What to Watch For
Myositis is a condition in which skeletal muscles are damaged by a noninfectious inflammatory process dominated by lymphocytic infiltration. Signs of myositis are generally sudden in onset.
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