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The nerve lesions in these people show dissemination in space with an otherwise normal neurological examination and without historical accounts of typical MS symptoms. [1] MRI findings that are consistent with multiple sclerosis have been observed in healthy people who underwent MRI scanning, and 50% go on to develop symptomatic MS, sometimes ...
Diffusion MRI may be used to identify areas of cytotoxic edema caused by poor blood flow (ischemia) but it is not clear if this prognostically relevant. [1] [4] Abnormal apparent diffusion coefficient is seen in about 20% of cases. [4] In 10–25% of cases of PRES there is evidence of hemorrhage on neuroimaging.
Sometimes the diagnosis must be retrospective, relying on gradual worsening of neurological signs/symptoms, due to the lack of understanding of the pathogenicity driving disease progression. [1] However, the only definite diagnosis of MS is post-mortem autopsy, where lesions typical of MS can be detected through histopathological techniques.
A study looking at ultra-detailed MRI scans of people hospitalized with severe COVID-19 found that the disease affects the brainstem, a region of the brain responsible for controlling many key ...
A clinically isolated syndrome (CIS) is a clinical situation of an individual's first neurological episode, caused by inflammation or demyelination of nerve tissue. An episode may be monofocal, in which symptoms present at a single site in the central nervous system, or multifocal, in which multiple sites exhibit symptoms.
MRI is also superior for pituitary imaging. [20] It may however be less effective at identifying early cerebritis. [21] In the case of a concussion, an MRI should be avoided unless there are progressive neurological symptoms, focal neurological findings or concern of skull fracture on exam. [22]
For further evaluation of tonsillar herniation, CINE flow studies are used. This type of MRI examines flow of CSF at the cranio-cervical joint. For persons experiencing symptoms but without clear MRI evidence, especially if the symptoms are better in the supine position and worse upon standing/upright, an upright MRI may be useful. [2]
There are other subtle warning symptoms to watch out for, neurologists say. A migraine attack can be a debilitating condition. But a headache is just one part. There are other subtle warning ...