Cistern of great cerebral vein
（重定向自Cisterna venae magnae cerebri）
The cistern of great cerebral vein (quadrigeminal cistern, ambient cistern) is a dilation of the subarachnoid space between the splenium of the corpus callosum and the superior surface of the cerebellum; it extends between the layers of the tela chorioidea of the third ventricle and contains the great cerebral vein and the pineal gland.