Pterygopalatine fossa (PPF) boundaries
| Medial | Perpendicular plate of the palatine bone and its orbital sphenoidal processes. |
| Lateral | Pterygomaxillary fissure. |
| Anterior | Superomedial part of the infratemporal surface of maxilla. |
| Posterior | Root of the pterygoid process and adjoining anterior surface of the greater wing of sphenoid bone. |
| Superior | Sphenoid sinus. |
| Inferior | Part of the floor is formed by the pyramidal process of the palatine bone. |