Air cells located below the ethmoid bulla, along the maxillary sinus roof and most inferior portion of lamina papyracea
including air cells located within the infundibulum.
Fracture of the lamina papyracea
is usually best demonstrated on CT.
6,16,17) The most common radiologic finding on CT was bony defect of lamina papyracea
and/or medial superior orbital rim.
Air cells located below the ethmoid Bulla, along the maxillary sinus roof and a most inferior portion of lamina papyracea
, including air cells located within the infundibulum: Bolger et al.
The medial border of the infundibulum is the lamina papyracea
These findings of ossification were described as extending into the right ethmoid cells to the lamina papyracea
with no extension into the orbit (figure, B).
There was also thinning and displacement of the ipsilateral lamina papyracea
noted but no evidence of any bony erosion.
Computed tomography (CT) of the sinuses demonstrated a large, enhancing mass within the left ethmoid sinus; CT also showed tumor erosion through the anterior cranial fossa and the left lamina papyracea
and compression of the medial rectus muscle and optic nerve (figure 1).
The bony structure that allows attachment to the lamina papyracea
is called the basal lamella.
Bony erosion of the anterior cribriform plate and left lamina papyracea
was also noted on review of the films.
Post op CT: Showed no residual foreign body with bony defect of medial orbital wall in the region of lamina papyracea
and ethmoid septae with polypoidal mucosal thickening in the left maxillary sinus.
This ensures a high degree of surgical accuracy in the nasal cavity, which is particularly important when working in critical areas such as the lamina papyracea
, the roof of the sphenoid sinus, and near the thin lateral lamella of the cribriform plate.