**2.7 Maxillary sinus**

The posterior wall of the MaxS can be opened below the pterygopalatine fossa through the V2-V3 vidian corridor, between V2 and the palatine nerve. Muller's muscle can be incised along with V2 and the fat around the PPG in the PPF removed. Under V2, the PPG can be translocated medially and inferiorly, thus exposing the upper part of the posterior wall of the MaxS, below the orbit.
