Rhomboid fossa

Last revised by Dr Grace Carpenter on 02 Aug 2021

The rhomboid fossa is the shallow, diamond shaped depression on the dorsal surface of the pons and medulla oblongata that  forms the floor of the fourth ventricle 1. It is covered by grey matter which is continuous with the spinal cord.

It may be divided into two parts:

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Cases and figures

  • Rhomboid fossa (illustration)
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