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What is the likely cause of the hyperdense lesion in the middle of the head, in the middle of the stack?
This is likely a colloid cyst, a small structure that can be found in the ventricular system.
Moderate atrophy.
Marked periventricular and deep white matter ischaemic changes.
No acute infarct or haemorrhage. No extra-axial collections or hydrocephalus.
7mm hyperdense cystic structure over Foramen of Monro unchanged from previous imaging - likely colloid cyst.
Small aneurysms of proximal basilar artery and left MCA bifurcation.