Chronic maxillary atelectasis (including silent sinus syndrome) can present bilaterally.

CONCLUSION: Chronic maxillary atelectasis was initially defined as a unilateral disorder, but this description has been challenged by reports of bilateral cases. Further investigation is required to determine the aetiology and pathophysiology of the disease.
PMID: 30773158 [PubMed - as supplied by publisher]

Source: Journal of Laryngology and Otology - February 19, 2019 Category: ENT & OMF Tags: J Laryngol Otol Source Type: research