Paralysis of 3rd, 4th, 6th nerves with involvement of ophthalmic division of 5th nerve,localizes the lesion to
3,4,5 cranial nerves pass in relation to the lateral wall of cavernous sinus. 6th cranial nerve passes through the cavernous sinus. Ref - BDC 6th vol3 topic - cranial nerves ;pg350
Cavernous sinus
Apex of orbit
Brainstem
Base of skull
Head and neck