Key result
CT of lipomatous meningioma reveals fat attenuation, explaining tumor heterogeneity and suggesting a benign process.
Why the study?
Lipomatous meningioma is a rare variant with characteristic CT features that can mimic necrotic malignant tumours, requiring clarification of its imaging appearance.
Case Report (n=1)
Lipomatous meningioma should be included in the differential diagnosis of an extra-axial fat-containing tumour on CT.
May support including lipomatous meningioma in the differential for extra-axial fat-containing tumors on CT; leaves open validation in larger series.
A case of lipomatous meningioma is reported. This is a rare variant of meningioma in which metaplasia of meningoepithelial cells occurs and mature adipocytes are present within the tumour. The heterogeneous attenuation and heterogeneous enhancement visualized on computed tomography (CT) can mimic necrotic malignant tumours. However, the demonstration of fat attenuation within the tumour explains the heterogeneity and suggests a benign process. The differential diagnosis of an extra-axial fat-containing tumour should include lipomatous meningioma.
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Fitt et al. (1996) conducted a case report in Lipomatous meningioma (n=1). Computed tomography (CT) was evaluated on CT appearance. Computed tomography of lipomatous meningioma demonstrates fat attenuation within the tumor, which explains its heterogeneous appearance and suggests a benign process.
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