Left cerebellopontine extra-axial mass measuring 31 x 19 x 24mm (AP x RL x CC) demonstrates intermediate T1 intensity, T2 hyperintensity and homogenous enhancement.
The tumor extends into the left internal acoustic meatus. Associated dural tail present with extension along the inferior aspect of the tentorium and partially into the left cavernous sinus probably at the site of Dorello's canal.
Mass effect present with effacement of the adjacent pons with minimal oedema present.
The 4th ventricle is mildly distorted but is not occluded and no evidence of hydrocephalus is present.
CT images show calcification within the mass and probable hyperostosis.
No further enhancing lesions detected.
Conclusion: Left CPA angle mass demonstrates features which would be in keeping with a meningioma, with mass effect of the pons and 4 th ventricle but no hydrocephalus and extension into the left IAM and left cavernous sinus. Extension into Dorello's canal presumably accounts of the patients CN VI palsy.