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Figure 1: (a) Contrast-enhanced magnetic resonance imaging of the patient with right-sided ophthalmoplegia showing enhancement along the cavernous sinus and along the tentorium cerebelli (Patient 1). (b and c) Magnetic resonance imaging fluid-attenuated inversion recovery sequence showing tumor-like masses along the splenium and bilateral occipital lobes and left frontal lobe. (d and e) Magnetic resonance imaging T1-weighed images after gadolinium contrast showing enhancement along falx cerebri and cerebelli with cerebrospinal fluid loculated in between. (f) Magnetic resonance venography showing nonvisualization of the superior sagittal sinus suggesting obliterative phlebitis and organized collaterals (Patient 3)

Figure 1: (a) Contrast-enhanced magnetic resonance imaging of the patient with right-sided ophthalmoplegia showing enhancement along the cavernous sinus and along the tentorium cerebelli (Patient 1). (b and c) Magnetic resonance imaging fluid-attenuated inversion recovery sequence showing tumor-like masses along the splenium and bilateral occipital lobes and left frontal lobe. (d and e) Magnetic resonance imaging T1-weighed images after gadolinium contrast showing enhancement along falx cerebri and cerebelli with cerebrospinal fluid loculated in between. (f) Magnetic resonance venography showing nonvisualization of the superior sagittal sinus suggesting obliterative phlebitis and organized collaterals (Patient 3)