Proliferative myositis presenting with a checkerboard-like pattern on CT.

P roliferative myositis is a rarely seen intramuscular inflammatory process. This pathology involves a fast-growing lesion showing diffuse infiltration to the muscular tissue; it is often misdiagnosed as a malignant sarcomatous tumor in clinical practice (1). In this article, ultrasonography (US), computed tomography (CT) and magnetic resonance imaging (MRI) findings in a case of proliferative myositis are presented. The patient underwent complete surgical excision to exclude malignancy. To the best of our knowledge, this is the first case of proliferative myositis with a checkerboard-like pattern diagnosed with the use of CT in the literature.