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Chapter 26. Sinonasal Development and Anatomy

Which of the following anatomical structures does not arise from the ethmoid bone?

A. Uncinate process

B. Inferior turbinate

C. Agger nasi

D. Middle turbinate

Which of the following sites corresponds to the weakest portion of the anterior cranial fossa skull base?

A. Junction of the posterior fovea ethmoidalis and lateral lamella

B. Lateral lamella, at the site of insertion of the anterior ethmoid artery

C. Skull base attachment of the middle turbinate

D. Superior attachment of the perpendicular plate of the ethmoid bone

Which of the following anatomic structures would be encountered first when extending a maxillary antrostomy posteriorly from the natural maxilary os toward the posterior maxillary sinus wall?

A. Nasolacrimal duct

B. Sphenopalatine artery

C. Descending palatine artery

D. Posterior septal artery

Presence of an onodi cell places which of the following structures at greatest risk intraoperatively?

A. Pituitary gland

B. Palatovaginal artery

C. Medial rectus muscle

D. Optic nerve

Which of the following cells would most likely displace the frontal sinus drainage pathway laterally?

A. Intersinus septal cell

B. Supraorbital ethmoid cell

C. Agger nasi

D. Frontal bulla cell

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