PMC3861600_01
Anteroposterior and lateral radiographs showing a defined osteolytic lesion in the tibial diaphysis with mild bulging on the posterolateral side.
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Plain radiographs did not show any evidence of periosteal reaction or cortical destruction (Fig. 1), however, confinement of the lesion to the cortex could not be confirmed.
Axial CT image demonstrating an osteolytic lesion in the lateral tibial cortex which did not involve the medullary cavity. CT, computed tomography.
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The measurements were 90 mm in length and 20x10 mm in maximum diameter (Fig. 2).
(A) Coronal T1-weighted MRI image revealing low-signal intensity in the central portion and high-signal intensity in the peripheral portion. (B) Coronal T2-weighted MRI image exhibiting high-signal intensity in the central and peripheral portions. MRI, magnetic resonance imaging.
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T1-weighted MRI and high-signal intensity on T2-weighted MRI, and a peripheral portion with high-signal intensity on T1-weighted and T2-weighted MRI (Fig. 3). Technetium-99m scintigraphic scanning revealed increased isotope uptake at the lesion site.
Intraoperative view of the intracortical lipoma. Following curettage, the true cortex was observed to be located beneath the lesion.
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Curettage was performed and the true cortex was located beneath the lesion (Fig. 4).
Histological appearance of an intracortical lipoma. Mature adipocytes and trabecular bone are shown (H&E stain; original magnification, x200).
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No cellular atypia, fat necrosis or calcifications were observed (Fig. 5).