Reason: R posterior thigh mass in hamstring region History: Right posterior thigh mass. Markers were placed along the posterior aspect of the mid to distal thigh, presumably denoting the site of the patient's palpable mass. Deep to these markers, there is focal prominence of the semimembranosus muscle, posteriorly, perhaps representing an anomalous bundle. It does not appear to be herniating through the deep peripheral fascia and there is no abnormal signal intensity or enhancement of the musculature. We otherwise see no mass. The bone marrow signal intensity of the femur is normal.
Slight asymmetry of the semimembranosus muscle likely due to a small anomalous muscle bundle, but we see no mass.