Chronic maxillary atelectasis

Chronic maxillary atelectasis is a descriptive term which is characterized by a persistent decrease in the maxillary sinus volume due to inward bowing of its walls. 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.

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

Article information

rID: 83493
System: Head & Neck
Synonyms or Alternate Spellings:
  • Chronic atelectasis of the maxillary sinus
  • Chronic maxillary atelectasis (CMA)

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Cases and figures

  • Case 1: with silent sinus syndrome
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