Articles Tagged With: neuropathology
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Comparing Patients with Early vs. Late-Onset Multiple Sclerosis
A recent retrospective study, combining data from a United Kingdom patient registry with a United Kingdom neuropathology tissue bank, showed that late-onset multiple sclerosis (MS), referring to disease onset after age 50 years, is linked with increased disability and quicker progression compared to MS onset at a younger age, and has distinct pathological features.
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Neuropathological Variability of NMDAR-Encephalitis
The neuropathological features of N-methyl-D-aspartate receptor (NMDAR)-encephalitis are described in an autopsy cohort of four patients — two diagnosed in life with comorbid brain disorders, and two diagnosed at autopsy and never treated. The two untreated patients had inflammatory infiltrates composed of perivascular and parenchymal T cells and B cells/plasma cells in the basal ganglia, amygdala, and hippocampus. The two treated patients had variable pathologies that reflected their underlying neurological disorders (lymphoproliferative disease and multiple sclerosis). Overall, the topographic distribution of inflammation in patients with NMDAR-encephalitis reflects the clinical symptoms of movement disorders, abnormal behavior, and memory dysfunction with inflammation predominantly observed in the basal ganglia, amygdala, and hippocampus. Loss of NMDAR-immunoreactivity correlated with disease severity.
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Neuropathological Findings in the Brains of Patients Who Died from COVID-19
In an autopsy study of 41 patients who died from COVID-19 in a single medical center in New York City, most of the brain pathology was the result of hypoxic-ischemic injury, infarction, and hemorrhage, with microglial activation and neuronophagia caused by inflammation. Studies for the presence of viral proteins were negative, and very low levels of viral ribonucleic acid were detected.
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Seafood Consumption and Brain Mercury Levels in Older Adults with Dementia
This cross-sectional study of older adults who were part of the Rush Memory and Aging Project demonstrated that moderate seafood consumption was correlated with a decreased level of brain Alzheimer’s disease neuropathology in APOE ε4 carriers. Higher brain levels of mercury were correlated with higher seafood consumption. However, these levels were not correlated with brain neuropathology.