maxillary antrum

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 [an´trum] (pl. an´tra, antrums) (L.)
a cavity or chamber. adj., adj an´tral.
antrum of Highmore maxillary sinus.
mastoid antrum an air space in the mastoid portion of the temporal bone communicating with the middle ear and the mastoid cells.
antrum maxilla´re (maxillary antrum) maxillary sinus.
pyloric antrum (antrum pylo´ricum) the proximal, expanded portion of the pyloric part of the stomach.
tympanic antrum (antrum tympa´nicum) mastoid antrum.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

max·il·lar·y si·nus

the largest of the paranasal sinuses occupying the body of the maxilla, communicating with the middle meatus of the nose.
Farlex Partner Medical Dictionary © Farlex 2012

maxillary sinus

A facial region that is one of a pair of usually symmetrical, hollow cavities located in the maxillary body. It is pyramidal, with the base projecting medially on the nasal cavity and laterally to the apex of the zygoma.

Maxillary sinus anatomy
• Roof—Formed by maxilla’s alveolar process (the roof forms the floor of the orbit).
• Walls (anterior)—Forms part of nasal cavity’s lateral wall, which is the facial surface of the medial maxilla.
• Walls (posterior)—Relates to the infratemporal space and pterygopalatine fossa.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

maxillary antrum

The maxillary sinus; a cavity in the maxillary bone communicating with the middle meatus of the nasal cavity.
See also: antrum
Medical Dictionary, © 2009 Farlex and Partners
References in periodicals archive ?
In Group A patients, postoperative maxillary antrum packing was done with commonly available latex made Foley's catheters, of size 16 or 18 French (the bulb of which has a capacity of 30-50 cc).
The operative findings included significant septic secretions within the left middle meatus and gelatinous soft tissue within the left maxillary antrum, which was sent for histological analysis.
An advanced lesion may produce destruction of the maxillary antrum wall making differentiation from a carcinoma impossible.
The patient was started on a steroid nasal spray and underwent endoscopic right sided sinus surgery with removal of polypoidal mass from the right nasal cavity and maxillary antrum. Histological analyses were consistent with chronic hypertrophic rhinitis with polyp formation.
Cholesterol granuloma of the maxillary antrum. J Laryngol Otol.
CT scan showed a soft tissue mass arising from Left maxillary antrum extending into the left nasal cavity with erosion of medial wall of maxillary sinus & inferior wall of orbit and lateral nasal bone.
Computed tomography (CT) demonstrated (1) a bony mass that was occupying the maxillary antrum, (2) an unerupted tooth just anterior to the mass, and (3) a patent maxillary sinus ostium (figure 1).
Ectopic eruption of teeth has been reported in mandibular condyle, coronoid process, orbit, maxillary antrum, palate, nasal septum and chin.
After elevation of orbital periosteum, a malleable retractor was introduced into the orbit, retracting the nasal process of maxilla, the nasal bone, and the medial wall of the maxillary antrum. There was a 5 x 4 x 3-cm, gray, well-encapsulated cystic mass in the left ethmoid sinus and nasal cavity, which extended to both the sphenoid sinuses and skull base.
Sites of predominace are nasal cavity, nasopharynx, larynx, trachea, bronchi and maxillary antrum. (6) Here, we present a case with both nasal and maxillary antral extension.
The tumor was found to be arising from the right maxillary antrum, and it extended medially to involve the middle meatus, the anterior ethmoid air cells, and the inferior turbinate.
It is extending medially to involve left maxillary antrum, nasal cavity and orbit.