Meningioma originating from the superior petrosal vein without dural attachment: A case report

Figure 1 Preoperative imaging. A and B: An extra-axial mass in the right cerebellopontine angle with isointensity on T2-wieghted image and iso-/hypointense signal mass on the T1-weighted image; C: Magnetic resonance imaging with gadolinium enhancement revealing a homogeneously enhancing mass without dural tail sign; D: Diffusion-weighted imaging; E: The corrected relative cerebral blood volume map showed high blood volume in the areas of the mass; F: Postoperative gadolinium-enhanced axial T1-weighted image shows no evidence of residual tumor.