TY - CHAP M1 - Book, Section TI - The Paranasal Sinuses A1 - Wells, Robert G. Y1 - 2015 N1 - T2 - Diagnostic Imaging of Infants and Children AB - The maxillary sinuses are the first of the paranasal sinuses to develop. In the neonate, the maxillary sinuses are quite small and may be partially or completely opacified. The maxillary sinuses grow progressively until the end of puberty. They reach the plane of the hard palate by 9 years of age. Asymmetry of the maxillary sinuses is common. The drainage ostium of the maxillary sinus is located superomedially. It empties into the infundibulum, which is located between the lamina papyracea and the uncinate process. The infundibulum opens into the middle meatus through the hiatus semilunaris. The maxillary sinuses become visible on standard radiographs at approximately 2 to 3 months of age.1,2 SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/10/10 UR - accesspediatrics.mhmedical.com/content.aspx?aid=1148944180 ER -