Fig. 5

Pelvis MRI, T1 weighted fat saturated sequence with gadolinium-based contrast, axial plane, of the right hip just inferior to the level of the lesser trochanter. The osteochondroma (*) displays a thin post contrast T1 hyperintense rim representing the fibrovascular tissue overlying the thin cartilaginous cap (arrowheads). The overlying adventitial bursa wall is post contrast T1 hyperintense (white dotted line) while the bursal contents are of an intermediate T1 signal intensity, less than skeletal muscle, likely related to its serosanguineous contents. The sciatic nerve (black dotted line) is displaced posteriorly and laterally from its normal course. Anterior (A) and posterior (P), and medial (M) and lateral (L) orientation is noted. Corresponding T2 fat saturated and T1 non fat saturated pre contrast axial slices are attached within the Supplemental File, (Supplemental Fig. 1, Supplemental Fig. 2)