[Idiopathic orbital myositis masked by migraine diagnosis: A case report].

Idiopathic orbital myositis is an inflammatory disease of the extraocular muscles and is a rare disease of orbit. Diagnosis is based on clinical and radiological findings. Demonstration of edema and thickening of extraocular muscles in orbital magnetic resonance imaging and dramatic response to corticosteroids are considered a pathognomonic finding for orbital myositis. In this case, we aimed to discuss a rare case and emphasize the importance of differential diagnosis in headaches.