Platybasia (diagrams)

Case contributed by A.Prof Frank Gaillard
Diagram

Figure 1. Standard measurement: angle formed by a line joining the nasion with the centre of the pituitary fossa and a line joining the anterior border of the foramen magnum with the centre of the pituitary fossa. (Normal 125°–143°, Platybasia >143°, Basilar kyphosis <125°)

Figure 2. Modified measurement: angle formed by a line extending across the anterior cranial fossa to the tip to the dorsum sellae and a line drawn along the posterior margin of the clivus. (normal value range (95% C.I) 116°-118° for adults and 113°-115° for children.)

Figure 3. example measurement in a patient with platybasia and a degree of basilar invagination

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Case information

rID: 2651
Published: 7th May 2008
Last edited: 20th Mar 2018
Inclusion in quiz mode: Excluded

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