Focal myositis is a pseudotumor of soft tissue that typically occurs i
n the deep soft tissue of the extremities, and is a relatively rare le
sion. There is a wide clinical spectrum, with approximately one-third
of patients with focal myositis subsequently developing polymyositis,
and clinical symptoms of generalized weakness, fever, myalgia, and wei
ght loss, with elevation of creatine phosphokinase. We report the case
of a patient with focal myositis who subsequently developed myositis
ossificans-like features.