Clinical, radiologic, and pathologic study of intraosseous lipoma of the tibia: A case report

Figure 1 Imaging examination of the patient. A: Preoperative X-ray showed that the lesion in the medial cortex of the left lower tibia showed an ellipsoidal increase in bone density, with a clear boundary and bone pattern; B: Preoperative computerized tomography showed an irregular ground-glass opacity in the left distal tibia, which measured about 24 mm × 8 mm in maximum diameter. There were slight thickening and sclerotic rim of the adjacent cortex; C: Preoperative magnetic resonance revealed an irregular slightly longer T1-weighted image and slightly longer T2-weighted image signal in the medial subcortical bone of the left distal tibial, with a uniform low signal ring at the edge of the left lower tibia, with a size of about 28 mm × 8 mm × 12 mm.

Figure 2  Postoperative pathological examination showed that there were a large number of mature fat cells in the bone cortex, with equal size and no obvious atypia, which were consistent with intraosseous lipoma (hematoxylin and eosin staining, × 100).

Figure 3 Postoperative X-ray of the patient. A: Postoperative X-ray at 1 month showed that the lesion of the left lower tibia was curetted and internal fixation was in place; B: Postoperative X-ray at 30 months showed that multiple bone grafts were seen in the lesion defect area of the distal tibia on the left side.