Pediatric Perspectives of Rhinosinusitis
Embryology And Anatomic Considerations
The paranasal sinuses begin to develop during the third week of gestation and continue to grow throughout early childhood and adolescence (Fig. 13.1). Two mesenchymal grooves develop along the lateral wall of the nasal cavity that become the inferior turbinate, the middle meatus, and the inferior meatus. The ethmoidoturbinate mesenchymal folds develop superiorly to give rise to the middle and superior turbinates. Once the turbinates are established, the sinuses begin to develop. During the third month of gestation, the maxillary sinus arises as an ectodermal outpocket from within the region of the middle meatal groove developing laterally. At birth, the cavity of the maxillary sinus is relatively small, with dimensions 7 × 4 × 4 mm. The sinus cavity continues to grow inferiorly and posteriorly and does not become level with the floor of the nose until age 12 years after the adult teeth have erupted [ 1]. As a result, the tooth buds are at...
KeywordsMaxillary Sinus Frontal Sinus Chronic Sinusitis Mometasone Furoate Functional Endoscopic Sinus Surgery
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