A well-defined extra axial intense heterogeneously enhancing lesion is noted in the left CP angle and infra-temporal region in the middle cranial fossa.
Few foci of blooming noted on SWI images.
Trigeminal nerve not visualised separately.
The extension of the lesion are as follows -
 Anteriorly it is extending into the orbital apex.
 Antero-laterally it is indenting the posterior wall of maxillary sinus with bowing.
 Medially it is compressing the lateral wall of the sphenoid sinus with inward displacement of the bony wall and narrowing the body of the left sphenoid sinus. There is also partial encasement of the left cavernous sinus.
 Posterior -Medially extending to the CP angle region compressing the midbrain along the trigeminal nerve, it is also extending into the Meckel’s cave. Trigeminal nerve Root is not seen separately
 Laterally it is compressing and displacing the left temporal lobe
 It is extending into infra-temporal region via foramen ovale along mandibular nerve. Trigeminal nerve not visualised separately. Inferior -Posteriorly it is displacing the internal carotid artery.
 Inferomedially is compressing the nasopharynx..
 Inferior-laterally it is abutting against the ramus of the mandible causing scalloping and lateral bowing.
IMPRESSION:
Lobulated extra axial lesion in the left CP angle and infra-temporal region in the middle cranial fossa through foramen rotundum into left temporal fossa (as described above) – Features most likely suggest left trigeminal Neurofibroma/Schwanoma.
For HPE correlation