Maxillary Sinus

**Semantic type:** Body Space or Junction

**Definition:** A pyramidal-shaped, thin-walled, air-filled cavity located in the maxilla. It is lined by mucus membrane and periosteum (mucoperiosteum) which contains cilia. It is adjacent to the nasal cavity and communicates with the middle meatus of the nose. It is the largest paranasal sinus and is composed of three recesses: alveolar, zygomatic, and infraorbital.

**Synonyms:** - Antrum Highmori - Antrum of Highmore - Antrum of Highmori - Antrum, Maxillary - Apertura Sinus Maxillaris - MAXILLARY SINUS - Maxillary sinus - Maxillary sinus structure (body structure) - Sinus(es), Maxillary - Sinus, Maxillary - antrum of Highmore - maxillary sinus - maxillary sinus - sinus maxilliaris