HYPERTROPHIED PALMARIS LONGUS MUSCLE, A PSEUDOMASS OF THE FOREARM - MR APPEARANCE - CASE-REPORT AND REVIEW OF THE LITERATURE

Magnetic resonance (MR) imaging of the forearm was performed to evalua te a presumed forearm soft-tissue tumor in a 26-year-old man. Sagittal and axial images revealed a mass isointense to muscle just medial to the flexor carpi radialis tendon (in the expected location of the palm aris longus muscle). A diagnosis of hypertrophied palmaris longus musc le was made. The radiologist must be familiar with the MR imaging appe arance of normal variants of the palmaris longus muscle, as this can o bviate surgery.