Frontal recess cells

Frontal recess cells are anterior ethmoid air cells that pneumatize the frontal recess. Their clinical relevance lies in their potential to obstruct the frontal recess outflow. As such, they should be reported by the radiologist preoperatively, especially in cases of frontal sinusitis.

Named frontal recess cells include:

• agger nasi cells
• frontal cells
• supraorbital air cells
• frontal bullar cells
• suprabullar cells
• interfrontal sinus septal cells

In 2016, an expert consensus resulted in the publication of the International Frontal Sinus Anatomy Classification.