[Pseudotumor in the forearm caused by focal myositis. A rare form of idiopathic inflammatory myopathy].

[focal myositis]

Focal myositis is a rare form of idiopathic inflammatory myopathy . We describe an additional case of focal myositis in a 54 -years -old woman presenting as a painful pseudotumor of the left forearm . Muscle enzymes were normal but generalized electromyographic abnormalities were found . We consider that focal myositis is a heterogeneous clinical syndrome , and the cases showing only focal involvement can be different from those that evolve into polymyositis .