Fig. 2. Various frontal sinus patterns: (A) symmetrical, (B) left asymmetry, (C) right asymmetry, (D) unilateral absence, and (E) bilateral absence. Red arrows shows frontal sinus. R, right side.

Anat Cell Biol 2022;55:294~303 https://doi.org/10.5115/acb.22.075

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