Chronic maxillary atelectasis is a descriptive term that is characterized by a persistent decrease in the maxillary sinus volume due to inward bowing of its walls.
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Terminology
It is not considered synonymous with - but can include the term silent sinus syndrome, typically when there is also spontaneous enophthalmos, hypoglobus, and/or mid-facial deformity in the absence of complaints related to the nose and paranasal sinuses 1.
Classification
Chronic maxillary atelectasis may be classified into three successive clinicoradiological stages:
- stage I: membranous deformity
- stage II: bony deformity
- stage III: clinical deformity
Treatment and prognosis
Intervention may depend on a number of factors, such as symptoms, with some suggesting it is better managed in a two-step manner. It is first mandatory to relieve the obstruction of the maxillary sinus and restore its normal ventilation. This is usually achieved via functional endoscopic sinus surgery.
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