19-year-old male with a right thigh mass. Evaluate for rectus tear versus neoplasm. Presents with pain to right thigh mass. Note is made of 3 vitamin E capsules overlying the anterior aspect of the right thigh presumably representing the patient's reported palpable area of concern. Note is made of an irregular enhancing lesion within the muscle belly of the rectus femoris muscle with associated T1 and T2 prolongation measuring approximately 2.0 x 1.4 cm, corresponding to the area of decreased attenuation seen on recent CT examination. There is associated focal fatty infiltration of the rectus femoris muscle in the surrounding area. These findings are nonspecific but remain suspicious for neoplasm including a vascular malformation. The remainder of the musculature is normal in appearance. No bone marrow signal abnormality is identified.
2 cm irregular enhancing lesion within the muscle belly of the rectus femoris which is nonspecific but remains suspicious for neoplasm including a vascular malformation.