Pontomesencephalic angle

Last revised by Yuranga Weerakkody on 10 Mar 2023

The pontomesencephalic angle has been described as an useful adjunct in the imaging diagnosis of intracranial hypotension. A normal value is 65˚ +/- 10˚, and a value less than 50˚ is suggestive of intracranial hypotension 1

Radiographic features

  • angle between two lines drawn along
    • anterior margin of the midbrain
    • anterosuperior margin of the pons

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Cases and figures

  • Figure 1: normal
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  • Figure 2: decreased in intracranial hypotension
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