The maxillary sinus (or antrum of Highmore) is a paired pyramid-shaped paranasal sinus within the maxillary bone which drains via the maxillary ostium into the infundibulum, then through hiatus semilunaris into the middle meatus. It is the largest of the paranasal sinuses.

What is the meaning of maxillary antrum?

The maxillary sinus (also called the maxillary antrum) is a pyramidal cavity (see Figs. ... The base of the pyramid is composed of the medial wall, which separates the maxillary sinus from the nasal cavity, and the apex is in the zygomatic process. Superiorly, the floor of the orbit forms the roof of the antrum.

What is left maxillary antrum?

Anatomical terminology. The pyramid-shaped maxillary sinus (or antrum of Highmore) is the largest of the paranasal sinuses, and drains into the middle meatus of the nose through the osteomeatal complex.