Fig. 1. Showing different shapes of the frontal sinus. (A) Irregular. (B) Comma shaped. (C) Oval. (D) Hypoplasia of frontal sinus. Horizontal arrows are directed towards the anterior aspect and upward arrows indicate a superior aspect of a specimen.

Anat Cell Biol 2023;56:179~184 https://doi.org/10.5115/acb.22.230

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