Craniofacial skeletal sequelae with these severe phenotypes are compatible with loss of frontonasal process derivatives, such as the ethmoid, nasal bones and premaxilla.
Both lateral ethmoids extend laterally beyond the frontal profile in dorsal view, but this condition is probably due to the crushing of the specimen.
The precise structure of the ethmoid region cannot be determined.
The shape of the nose is determined by the ethmoid bone and the nasal septum, which consists mostly of cartilage and which separates the nostrils.
The ethmoid fracture can produce bone fragments that penetrate the cribriform plate.
The lacrimal duct, nasal bone, nasal cavity, vomer, maxillary sinus, cribriform plate, and ethmoid cells are often missing on the involved side.
This involves penetrating three separate sinus cavities: the ethmoid sinus, the sphenoidal sinus, and the maxillary sinus.
This procedure is often successful in the removal of small encephaloceles of the ethmoid osteomas of the ethmoid sinus wall or small olfactory groove meningiomas.
