Contrast-enhanced studies also show that focal thickening takes place at the exit of the nerve in the interpeduncular
cistern without enhancement of the cavernous sinus or adjacent dura.
More specifically, a "V sign"--a distinct pattern of V-shaped hyperintensity on axial FLAIR and DWI sequences along the pia surface of the midbrain adjacent to the interpeduncular
fossa--has been described in 67% of AOP cases.
Radiological parameters noted were midline shift, types of intracranial haemorrhage such as epidural haematoma, subdural haematoma, intracerebral haematoma, fracture and diffuse brain injury, area of brain involved, status of total 9 cisterns (Interpeduncular
, two crural, two ambient, Quadrigeminal, sellar and two Sylvian cistern) whether opened or closed.
On MR angiography, the internal cerebral vein and the vein of Galen were observed to be dilated and an arteriovenous malformation (AVM) was noted originating from the interpeduncular
cistern extending into the quadrigeminal cistern and lateral ventricle, nourished by the posterior cerebral artery, draining into the internal cerebral vein and vein of Galen.
fossa crosses the plane of the incisura.
Ausman et al., "Microvascular anatomy of the interpeduncular
fossa," Journal of Neurosurgery, vol.
The tumor extended into the prepontine and interpeduncular
The supraorbital keyhole approach effectively exposes the frontal lobe base, anterior clinoid process, canalis opticus, olfactory sulcus, olfactory tract, optic nerve, optic chiasm, oculomotor nerve, anterior communicating artery, anterior cerebral artery A1 segment, pituitary stalk, diaphragma sellae, dorsum sellae, posterior clinoid process, basilar artery apex, posterior cerebral artery P1 segment, superior cerebellar artery proximal, front upper pontine and interpeduncular
cistern, anteromedial temporal lobe, internal carotid, middle cerebral artery (M1, M2 segment, and part of M3 segment), anterior choroidal artery, posterior communicating artery; and contralateral carotid artery medial surface, anterior cerebral artery A1 and A2 proximal, middle cerebral artery M1 and M2 proximal.
[1,2] JS is an autosomal recessive neurodevelopmental disorder, characterized by molar tooth malformation, a complex brainstem malformation that reflects aplasia and marked hypoplasia of cerebellar vermis, thickened and elongated superior cerebellar peduncles, and deepened interpeduncular
fossa that is apparent on axial magnetic resonance imaging (MRI) at the midbrain-hindbrain junction.
After preoperative preparation, endoscopic ventriculocisternostomy was performed, so that communication between third ventricle and interpeduncular
cistern was created.
It also produced a compressive effect to the posterior side of the brainstem, occupying and broadening the interpeduncular