arachnoid cyst located near the quadrigeminal cistern has been reported as paracollicular arachnoid cyst , arachnoid cyst of the quadrigeminal cistern , paramesencephalic arachnoid cyst , arachnoid cyst posterior to the third ventricle , cyst of the cisterna ambiens .
C0078981
arachnoid cyst
C0010709
cyst