Hypoplastic maxillary sinuses
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- An abnormally small size of both maxillary sinuses. The right maxillary sinus is classified type II maxillary sinus hypoplasia according to Bolger classification with poorly developed infundibulum and uncinate process. The left maxillary sinus is classified type III maxillary sinus hypoplasia according to Bolger classification with absent infundibulum and uncinate process.
Hypoplasia of the maxillary sinus is uncommon and as it is asymptomatic it is usually identified as an incidental finding when CT is obtained for other reasons.