This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head and neck, Subject name: Anatomy
All of the following structure lies outside the cavernous sinus except 
Select and explain. 
A. Sphenoidal air sinus, B. Internal carotid aery, C. Foramen lacerum, D. Maxillary nerve
D: Maxillary nerve
Answer: D: Maxillary nerve 
Explanation: structures outside the sinus: 1. Superiorly: optic tract, optic chiasma, olfactory tract, internal carotid aery and anterior perforated substance. 2.inferiorly: foramen lacerum and the junction of the body and greater wing of the sphenoid bone 3.medically: hypophysis cerebri and sphenoidal air sinus 4.laterally: temporal lobe with uncus 5.below laterally: mandibular nerve 6.anteriorly: superior orbital fissure and apex of the orbit 7.posteriorly: apex of the petrous temporal and the crus cerebri of the midbrain Ref BDC volume 3:sixth edition pg 193