Axial plane of computed tomography scan. This section showing the lower level of lacrimal fossa and other structures around this. Lacrimal fossa consists of maxilliary bone (MB, yellow) and lacrimal bone (LB, green) and these 2 bones connect at anterior lacrimal crest (MB-LB). In this case the location of the anterior insertion of the uncinate process (UP) is anterior to the posterior lacrimal crest (PLC) and posterior to the maxillary bone. LS, lacrimal sac; MT, middle turbinate; S, septum.