PMC4897026_01
39-year-old man with multiple hereditary exostoses and enlarging right hip mass. Radiograph shows soft tissue calcification adjacent to an exostosis arising from the greater trochanter. extending superiorly into the right gluteal region (arrow).
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The radiographs (Fig. 1) demonstrated soft tissue calcification adjacent to the greater trochanter of the right femur extending superiorly into the right gluteal region.
Transverse CT slices through the pelvis show (A) calcified fragment (arrowhead) and (B) osteochondroma (arrow).
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The CT (Fig. 2) verified a large pedunculated osteochondroma arising from the anterior aspect of the right femoral neck with a thick cartilaginous cap and surrounding fluid.
(A-B) Transverse T1-weighted and T2-weighted and (C-D) coronal T1-weighted and T2-weighted MRI shows cartilage cap of osteochondroma (arrow) and fracture plane (arrowhead).
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MRI (Fig. 3) demonstrated multiple osteochondromas consistent with the patient's history of hereditary multiple exostoses.
Radionuclide bone scan shows increased activity at the right hip.
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The radionuclide bone scan with 99m-Tc (Fig. 4) showed increased uptake in the previously existing osteochondromas.