Heterogeneous T1 and T2 signal intensity abnormality is evident in the left vastus intermedius muscle at the site of the ossification noted on the prior CT scan. Areas of low signal intensity on both the T1 and T2 weighted sequences correspond to the ossification noted on the prior CT. Surrounding high T2 signal intensity abnormality is noted within the muscle. No signal intensity abnormality is noted within the cortex of the femur or within the medullary cavity and again no periosteal reaction is identified.
Heterogeneous enhancement of the lesion within the vastus intermedius muscle is noted post gadolinium enhancement. No abnormal enhancement is evident within the femur. No mass is identified in the region of abnormal signal intensity and enhancement.