Turbinate 4... The middle turbinate is a key landmark during sinus examination and surgery. Holes have been drilled into the middle turbinate to help us see through it. It can usually be seen if the nose is decongested with spray. The anterior sinuses lie lateral to the middle turbinate. The frontal sinus, maxillary sinus, and anterior ethmoid sinuses drain out from under the middle turbinate. 1999 Peter Casano, M.D.