I HAVE TORTUOSITY OF THE LEFT VERTEBRAL ARTERY WHICH EXTENDS INTO THE LEFT CEREBELLAR PONTINE ANGLE AND APEARS TO ENCROACH UPON THE ROOT ENTRY ZONE OF THE LEFT NERVE Vlll..Plus there is aprox. 1.2 x o.7 cm CFS signal intensity focus along the inferior aspect of the left cerebellar pontine angle cistern...what could cause this and what is the outcome?

Summarized question: What causes tortuosity of vertebral artery suggest?