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Egyptian Journal of Radiology and Nuclear Medicine
Fig. 1 | Egyptian Journal of Radiology and Nuclear Medicine

Fig. 1

From: FDG avid cerebellar atypical meningioma masquerading as solitary brain metastases in a recently diagnosed breast malignancy: a toss between MR and CT

Fig. 1

Top row, right to left: transaxial brain CECT, fused FDG PET/CT transaxial brain image and histology of papillary meningioma. Bottom row: coronal MR (T1W1), DWI, ADC and fused (FDG PET/MR with ADC map) images. Post-contrast CT showed homogenous enhancement of extra-axial lesion (crosshair). Fused FDG PET/CT image showed increased FDG uptake consistent with the cerebellar lesion. Histopathology was conclusive and revealed characteristic perivascular pseudopapillary pattern suggesting papillary meningioma (WHO grade III). T1W1 image confirms homogenous enhancement of the lesion. DWI revealed isointense to slight hypointense lesion with predominantly low signal (thick arrow) and scattered hyperintensities (thin arrow) on ADC map unlike other atypical meningioma. Surrounding perilesional edema was noted. An MRI imaging diagnosis of solitary brain metastasis was made. But CT raised possibility of extra-axial cerebellar meningioma

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