Clinical, pathological and magnetic resonance imaging features of focal myositis: report of three cases.

Focal myositis is a rare idiopathic form of inflammatory myositis involving a single muscle. The presentation is often as a soft tissue pseudotumour. Magnetic resonance imaging (MRI) is a useful noninvasive imaging modality to demonstrate focal nature of the lesion. We describe three patients presenting as pseudotumour of the lower leg. MRI showed hyperintense signals in the involved muscle.