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1. Frontal sinus 2. Crista galli 3. Cribriform plate 4. Lesser wing of sphenoid 5. Superior orbital fissure 6. Superior border of petrous part of temporal bone 7. Dense shadow of petrous part of temporal bone 8. Perpendicular plate of the ethmoid 9. Vomer 10. Maxillary sinus 11. Inferior concha 12. Ramus of mandible 13. Body of mandible |
