Orbital Causes of Ostiomeatal Complex Occlusion

Area of Science:

• Otolaryngology
• Ophthalmology
• Radiology

Background:

• Ostiomeatal complex (OMC) occlusion and maxillary atelectasis are typically associated with sinonasal diseases.
• Orbital pathologies are an uncommon but significant cause of OMC obstruction.

Purpose of the Study:

• To describe rare instances of OMC occlusion and maxillary atelectasis resulting from orbital conditions.
• To highlight the association between orbital pathology and secondary sinus complications.

Main Methods:

• Retrospective chart review at a single institution.
• Inclusion criteria: patients with OMC occlusion and maxillary atelectasis with an identifiable orbital cause.
• Exclusion criteria: idiopathic occlusion (silent sinus syndrome). Data included clinical presentation, radiographic findings, and treatment outcomes.

Main Results:

• Eight patients with mechanically induced OMC occlusion from orbital causes were identified.
• Causes included malpositioned orbital floor implants (5 cases), orbital decompression complications (2 cases), and inferior orbital venous malformation (1 case).
• Most patients required combined endoscopic sinus surgery and orbital intervention.

Conclusions:

• Orbital pathology can lead to OMC occlusion and maxillary sinus atelectasis, though rare.
• Orbital surgeons should suspect this association when maxillary atelectasis is present with orbital disease.
• Management necessitates addressing the orbital cause and multidisciplinary care, including sinus surgery and potential orbital reconstruction.