What region is the abnormality located in?
The main lesion is in the left peri-parotid region.
What type of lesion is it, e.g. vascular, cartilaginous?
The lesion is neural and with its location, likely to be part of the facial nerve and its branches.
Left sided facial lesion
There is a large lobulated mass lesion extending from the base of skull in the peri-parotid region. It is high-T2, low-T1 and enhances. In addition, there is bilateral T2-bright white-matter abnormality.