From the case:
Pontomesencephalic angle
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Normal pontomesencephalic angle (55-75˚ is within normal limits). The angle is measured between two lines drawn:
- anterior aspect of the midbrain
- anterosuperior aspect of the pons
Case courtesy of Dr Bruno Di Muzio, Radiopaedia.org, rID: 39310. Modifications: red lines, crop.
From the case:
Pontomesencephalic angle
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Reduced pontomesencephalic angle in intracranial hypotension due to CSF overshunting.
Original case courtesy of Dr Andrew Dixon, Radiopaedia.org, rID: 17455. Modifications: crop, red lines.
Case Discussion
A pontomesencephalic <50˚ is suggestive of intracranial hypotension (other features should be present).
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