The hiatus semilunaris (or semilunar hiatus) is a crescent-shaped groove in the. Into the ethmoid infundibulum, which then drains through the hiatus semilunaris to the. Semilunar hiatus - , the free encyclopedia The hiatus semilunaris (or semilunar hiatus) is a crescent-shaped groove in the. Of the uncinate process of the ethmoid bone, superiorly by the ethmoidal bulla. The Frontal Sinus Drainage Pathway and Related Structures The hiatus semilunaris is the narrow, slitlike passage between the uncinate. Handout 7.63 composed of palatine process of maxillary bone and horizontal plate of.
Ethmoid Sinus: Normal Anatomy Variants The ethmoid sinus can have a variable number of air cells. 2) Anterior ethmoidal sinus and 3) Maxillary sinus open into Hiatus semilunaris.