Development of frontal sinus in human fetuses as seen in computerized tomography.
Using computerized tomography 7 human fetuses were examined, aging 24 to 39 weeks. Frontal sinus developes in the region of frontal recess of the frontal nasal meatus in a fetus aging 27 weeks. In the latter weeks of the fetal life the frontal recess of the middle nasal meatus transforms upwards into an oval thin-walled space corresponding to the developing frontal sinus. It adheres to the ethmoidal slabyrinth, integrating with it.
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D004724:Endoscopy; D005333:Fetus; D005626:Frontal Sinus; D006801:Humans; D009296:Nasal Cavity; D014057:Tomography, X-Ray Computed