MR images (Figs 1a - c) demonstrated numerous collateral vessels around the brainstem, especially within the ambient and quadrigeminal
Routine tissue samples taken for histological investigation included the following parts of the brain: medulla, pons, cerebellum, quadrigeminal
bodies, epithalamus, thalamus, hypothalamus, some parts of the cerebral cortex, and the vascular plexus of the lateral ventricles.
Patients with increased intracranial pressure as evidenced by ventricular shift or compression of the quadrigeminal
plate are not eligible for BBBD.
A CT scan showed a hypodense lesion (-48 Hounsfield units) with arc like calcification in left half of quadrigeminal plate cistern.
The findings were consistent with fat and a diagnosis of quadrigeminal plate cistern lipoma was made.
A CT scan showed low-density lesion of the left quadrigeminal plate cistern.
6) Intracranial arachnoid cysts are most commonly found in the middle cranial fossa (50% to 60%), the parasellar region (10% to 15%), the quadrigeminal
plate cisterns (10%), the cerebellopontine angle (5% to 10%), the supracerebellar cistern (5%), and the cisterna magna (5%).
Dilated arteries drain into a large midline venous pouch in the region of the quadrigeminal
Mass effect on the quadrigeminal
plate from supratentorial hydrocephalus, or a mass, can cause secondary narrowing of the aqueduct.
to insert 24 G LP needle in one of the supraorbital notch and proceeding forwards and inwards always touching the orbit's roof pointed towards ipsilateral optic canal and then feeling the give way as and when the quadrigeminal
cistern is reached then drain the CSF and do the superfusion for quadrigeminal
cistern superfusion and cisternal puncture for IV ventricular superfusion with SNP i.