an inhomogeneous mass is seen in the region of the medulla and pons. The lesion is partially hypodense suggesting necrosis or cystic internal structure
the fourth, third and lateral ventricles as well as the quadrigeminal cistern are mildly dilated due to resultant partial obstruction of CSF flow.
note is also made of the marked dilatation of the intraorbital segment of the right and the retrorbital part of the left optic nerve and the distension of the perioptic CSF space on the right.
complete right and partial left lower lobe collapse on chest CT due to aspiration (not shown)
An urgent brain MRI with IV contrast was therefore performed.