Head and Neck Imaging

Nasal fontanelle

area of the lateral nasal wall where no bone is present, with the separation between the maxillary sinus and nasal cavity consisting only of a fibrous (periosteal) layer. They are usually found between the inferior and middle nasal turbinate. The anterior fontanelle is anterior to the uncinate process, the posterior fontanelle is posterior to it. The nasal fontanelles may harbour an accessory ostium to the maxillary sinus. Also, see sinonasal cavities anatomical variations.

RH