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Leptomeningeal collateral vessels from the anterior cerebral artery and posterior cerebral artery appeared to allow for perfusion of some brain tissue to persist, partially compensating for the loss of the major vessel. [6] This compensatory effect is however usually inadequate to maintain a normal blood supply. [11]
The exact incidence of leptomeningeal disease is difficult to determine, since gross examination at autopsy may overlook signs of leptomeningeal disease, and microscopic pathological inspection may be normal if the seeding is multifocal or if an unaffected area of the central nervous system (CNS) is examined.
By virtue of the leptomeningeal cell layer, the perivascular spaces belonging to the subarachnoid space are continuous with those of the subpial space. The direct communication between the perivascular spaces of the subarachnoid space and the subpial space is unique to the brain's arteries, as no leptomeningeal layers surround the brain's veins.
These all had a punched-out appearance on follow-up MRI. Though most commonly involving white matter, many patients also had lesions in deep grey matter structures, as well as leptomeningeal enhancement. Multiple sclerosis (MS) and acute disseminated encephalomyelitis (ADEM) can mimic the MRI changes seen in patients with Susac's syndrome ...
Typically, dementia is associated with classic symptoms like confusion and memory loss. But new research finds that there could be a less obvious risk factor out there: your cholesterol levels ...
A Chicago woman was just weeks away from giving birth when a nagging cough led to a shocking medical discovery. MaKenna Lauterbach shared her harrowing story with Fox News Digital.
It shows enhancement of meninges at the tentorium and in the parietal region, with evidence of dilated ventricles. Fluid-attenuated inversion recovery ( FLAIR ) is a magnetic resonance imaging sequence with an inversion recovery set to null fluids.
They discovered that for every extra year a person’s body aged faster than normal, the risk of developing colon polyps went up by 16%. Surprisingly, common risk factors like body weight and ...