"999"^^ . . . . "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."@en . "Maxillary+Sinus"@en . . . . "Maxillary sinus"@en . "223"^^ . . . "A04.531.621.578" .