CT
Partial opacification of the left middle ear and mastoid spaces, with a bone defect into the posterior fossa.
Associated collections in the subdural space between the cerebellum and tentorium, crossing the midline and surrounding the dorsal surface. Extension of this collection into the foramen magnum.
Little appreciable enhancement. No pneumocephalus.
Mild generalised volume loss, but no specific supratentorial findings.
Partly opacified anterior paranasal sinuses.