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A well-defined extra-axial mass of the posterior cranial fossa with a broad-based dural attachment to the posterior margin of the tentorium cerebelli and adjacent to the right sigmoid sinus. It displays an isosignal to the cortical grey matter on T1, T2 and a slightly high signal on FLAIR fat sat with a central calcification of a high signal on T1 and a low signal on FLAIR, T2 and GE sequences. Vivid enhancement on postcontrast sequences. The adjacent sigmoid sinus is invaded and best seen on postcontrast axial and coronal sequences.
Small vessel ischaemic change.