What does brain big occipital cistern mean?

The cisterna magna is located in the posterior inferior part of the posterior cranial fossa, between the cerebellum, the dorsal surface of the medulla oblongata and the inferior occipital squamata, and leads upward to the fourth ventricle. After CT or MRI examination of the skull, the cisterna magna is found to be more than 10 mm away from the cerebellar cortex or the cerebellar vermis and the inner occipital plate. It can be considered as the cisterna magna. Some patients with cisterna magna will show dizziness, nausea, vomiting, etc., and need to see a regular hospital. Maintain good living habits.