Extramural air cell

Last revised by Vincent Tatco on 24 May 2017

An extramural air cell is one that is not contained within its named parent bone. So, the infraorbital ethmoidal air cells that lie within the maxilla rather than the ethmoidal bone are an example of extramural air cells.

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Cases and figures

  • Case 1: on left (arrow)
    Drag here to reorder.