Figure 4a. Subzygomatic approach. (a) CT scan shows a soft-tissue mass (arrowheads) in the right pterygopalatine fossa. A direct lateral approach is precluded by the zygomatic arch (Z). (b) CT scan shows a biopsy needle (arrow) inserted at a level caudad to the zygomatic arch. The needle was advanced in a cranial direction by using the triangulation method. (c) CT scan obtained at a more cranial level shows the needle tip (arrow) within the soft-tissue mass (M) in the pterygopalatine fossa.