Anterior Ethmoidal Air Cells, Anterior View

Description

Anterior ethmoidal air cells occupy the anterosuperior portion of the ethmoidal labyrinth, and this frontal perspective centers their thin bony septa within the ethmoid bone between the nasal cavity medially and the orbit laterally. Ethmoidal bullar cells are visible as larger, rounded aerated cavities that correspond to the ethmoidal bulla, positioned posterolateral to the frontal recess and superior to the level of the middle meatus. Superiorly, the cell group approaches the cribriform plate region, while laterally the lamina papyracea forms the delicate orbital boundary. Bone is thin here. Clinical work around the anterior ethmoid is unforgiving because small variations in cell size and partitioning directly affect the frontal recess and the anterior drainage pathway into the middle meatus, a common bottleneck in chronic rhinosinusitis. The fixed frontal orientation is useful for teaching the medial orbital wall relationship and for emphasizing how close the ethmoidal air cells sit to the lamina papyracea and skull base, where an incomplete understanding can lead to orbital fat exposure, extraocular muscle injury, or cerebrospinal fluid leak during functional endoscopic sinus surgery (FESS). Attention naturally falls on the bullar region and adjacent compartments, an area frequently opened during anterior ethmoidectomy to restore ventilation while protecting the course of the anterior ethmoidal artery as it traverses from orbit toward the anterior cranial fossa. Use this illustration for gross anatomy and otolaryngology teaching sessions on paranasal sinus anatomy, for figure plates in FESS atlases describing frontal recess and anterior ethmoid approaches, and for patient-facing surgical consent materials that need a precise but bone-focused explanation of ethmoid sinus disease. Anatomical accuracy verified by SciePro's Medical Advisory Board.