The main risk of performing surgery in the nasopharynx is the potentially mortal rupture of the parapharyngeal or petrous ICA . The petrous segment [ 39 ] and the angulation of its bends is variable [ 42 , 43 ] and may receive collateral blood flow from the external carotid artery during ICA occlusion [ 22 ].
RHJQL. 143 461 164 60 453 482 396 318 153