| A possible related injury is a torn brachialis muscle with associated myositis. |
| The three main disorders in this group are dermatomyositis, polymyositis, and inclusion body myositis. |
| Progressive pulmonary fibrosis occurs in 10 percent of patients and, along with myositis of the respiratory muscles, may lead to hypoxemia. |
| Rule out other causes such as claudication, disk disease, hypothyroidism, and myositis. |
| The first type, which arises de novo in adults, is characterized by myocarditis, myositis, lymphadenitis, hepatitis, and chorioretinitis. |
| He is diagnosed with inclusion body myositis, a degenerative muscle disease that slowly destroys muscle mass. |
