Meningioma invading the dural venous sinus
Headaches with memory disorders.
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There is a large extra-axial mass (6.8 x 5.7 x 5.2 cm) in the left temporo-occipital region with a broad-based dural attachment. It shows an iso-signal to the grey matter on T1WI, slight high signal on T2WI, and FLAIR with intense, and relatively homogeneous enhancement on postcontrast sequences.
This mass invades the ipsilateral transverse/sigmoid venous sinuses. A mass effect is noted on the midline structures.