Supra bulla frontal cell

Supra bulla frontal cells are an anatomical variant of the paranasal sinuses, included in the International Frontal Sinus Anatomy Classification.

Gross anatomy

Cell that originates in the supra-bulla region and pneumatizes along the skull base into the posterior region of the frontal sinus. The skull base forms the posterior wall of the cell.

The supra agger cells push the drainage pathway anteriorly.