Although the prevalence of Normal-pressure hydrocephalus (NPH) remains imprecise and is calculated to be 1.30% for those aged ≥ 65 years, a severe problem of underdiagnosis seems to exist 1).
see Idiopathic Normal pressure hydrocephalus diagnosis.
Its clinical diagnosis and pathological mechanism are still unclear. Leucine-rich alpha-2 glycoprotein (LRG) is involved in various human diseases, including cancer, diabetes, cardiovascular disease, and nervous system diseases. Now the physiological mechanism of LRG is still being explored. According to the current research results on LRG, ma et al. found that the agency of LRG has much to do with the known pathological process of NPH. According to the collected literature evidence, they speculated that LRG probably be involved in the pathological process of NPH. Finally, based on the mechanism of LRG and NPH, thy also summarized the evidence of molecular targeted therapies for future research and clinical application 2).
A case of normal pressure hydrocephalus (NPH) 2 months after acute COVID19 infection, in a patient without other risk factors.
A 45-year-old male patient presented an 8-month history of progressive gait disorder and cognitive impairment after being hospitalized for SARS-CoV-2 infection. Magnetic resonance imaging (MRI) was compatible with NPH. A spinal tap test was positive and there was progressive improvement after shunting, with complete resolution of symptoms.
Other infections such as syphilis, cryptococcosis and Lyme disease have been associated with NPH. Possible mechanisms for NPH after COVID include disruption of choroid plexus cells by direct viral invasion or as a result of neuroinflammation and cytokine release and hypercoagulability leading to venous congestion and abnormalities of CSF flow. Given the significance of NPH as a cause of reversible dementia, it is important to consider the possibility of a causal association with COVID19 and understand the mechanisms behind this association 3)