McGrigor-Campbell lines

Last revised by Benjamin Li Shun Chan on 11 Dec 2023

McGrigor-Campbell lines are imaginary lines traced across the face on an occipitomental (Waters) view skull radiograph to assess for fractures of the middle third (especially) of the face 3:

  • first line is traced from one zygomaticofrontal suture to another, across the superior edge of the orbits

  • second line traces the zygomatic arch, crosses the zygomatic bone, and traces across the inferior orbital margins to the contralateral zygomatic arch

  • third line connects the condyle and coronoid process of the mandible and the maxillary antra on both sides

  • fourth line crosses the mandibular ramus and the occlusal plane of the teeth

The face is inspected for any asymmetry along these lines and Dolan's lines.

The first line is breached in the superior orbital wall as seen in the black eyebrow sign.

The second line is breached in the inferior orbital wall fracture as seen in the tear drop sign.

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