Fischgold's bimastoid line

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Synonyms
FBML

The Fischgold bimastoid line is an imaginary radiographic line connecting the two most caudally located points of the mastoid processes.

Interpretation

The dens of the axis lies an average of 2 mm above this line (range from 3 mm below to 10 mm above)1. The Fischgold bimastoid line should cross the atlanto-occipital joint.

Figure

FDGL and FBML
Visualization of the Fischgold bimastoid line and the Fischgold digastric line. Figure adapted from Greenberg 2019.

References

    1. Imaging and Diagnostics. In: Greenberg M, ed. Handbook of Neurosurgery. 9th Edition. Thieme; 2019. ↩ ↩

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