MRI confirms dual, solid, heterogeneously enhancing periarticular mass lesions. The superior lesion is at the level of the left lateral collateral ligament and distal iliotibial band. The inferior lesion is adjacent to the tibialis anterior and extensor digitorum longus muscle. The lesions are extra-articular. Sagittal imaging confirms a dumbbell appearance with a linear connecting band of tissue. The distal femur, proximal tibia, and femur appear normal on all sequences.