52-year-old male with known hepatic carcinoma now with recurrent fevers presents with right thigh pain and mass on recent CT examination. Note is made of a lobulated heterogeneous collection within the muscle belly of the biceps femoris measuring 8.7 x 4.9 x 6.7 cm (TR x AP x CC). There are foci of increased signal intensity on T1-weighted imaging consistent with blood products. Additional smaller collections are identified more superiorly within the muscle belly of the biceps femoris. There is minimal, if any, thin peripheral enhancement on postcontrast sequences. These findings are most consistent with a hematoma, however, follow-up examination is recommended to establish interval resolution/evaluate for interval change. The remainder of the imaged musculature of the right thigh demonstrates diffuse fatty infiltration. There is nonspecific subcutaneous edema about the thigh. No bone marrow signal abnormality is identified. A marker is in place along the posterior aspect of the right thigh presumably corresponding to the patient's palpable area of concern.
Large heterogeneous collection within the muscle belly of the biceps femoris appearing most consistent with a hematoma, however, follow-up examination is recommended to establish resolution/evaluate for interval change.