The prevalences of frontal bullar, suprabullar, supraorbital ethmoidal, and interfrontalsinus septal cells were 10%, 7.8%, 3.6%, and 6.8%, respectively.
Seong-Soo Park, Bit-Na Yoon, Kyu-Sup Cho, Hwan-Jung Roh 2010, 'Pneumatization Pattern of the Frontal Recess: Relationship of the Anterior-to-PosteriorLength of Frontal Isthmus and/or Frontal Recess with the Volume of Agger Nasi Cell',Clinical and Experimental Otorhinolaryngologyhttp://www.e-ceo.org/upload/pdf/ceo-3-76.pdf. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
This can be accomplished most easily using an interfrontal sinus septal cell or an eccentric interfrontal sinus septum.
K. Mohammed, Al Komser M.D., M.A.S., Andrew N. Goldberg M.D., M.S.C.E. 2013, 'Unilateral Transnasal Endoscopic approach to Frontal Sinuses: Draf IIc', Allergy & Rhinologyhttps://doi.org/10.2500/ar.2013.4.0058. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)