Extramural air cell

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.

Anatomy: Head and neck
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Article information

rID: 1310
System: Head & Neck
Section: Anatomy
Tag: refs, cases
Synonyms or Alternate Spellings:

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Cases and figures

  • Haller

Haller ce...
    Case 1: on left (arrow)
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