Tectal beaking (midbrain)

Last revised by Maxime St-Amant on 31 May 2018

Tectal beaking refers to the fusion of the midbrain colliculi into a single beak pointing posteriorly and invaginating into the cerebellum. It is seen with a Chiari type II malformation.


The term bird beak sign is used in a number of other contexts: see bird beak sign (disambiguation).

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Cases and figures

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