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Hydrocephalus can also be caused by overproduction of CSF (relative obstruction) (e.g., choroid plexus papilloma, villous hypertrophy). [26] [27] Bilateral ureteric obstruction is a rare, but reported, cause of hydrocephalus. Hydrocephalus can be classified into communicating and noncommunicating (obstructive).
Aqueductal stenosis is a narrowing of the aqueduct of Sylvius which blocks the flow of cerebrospinal fluid (CSF) in the ventricular system.Blockage of the aqueduct can lead to hydrocephalus, specifically as a common cause of congenital and/or obstructive hydrocephalus.
Normal pressure hydrocephalus (NPH), also called malresorptive hydrocephalus, is a form of communicating hydrocephalus in which excess cerebrospinal fluid (CSF) builds up in the ventricles, leading to normal or slightly elevated cerebrospinal fluid pressure.
Low-pressure hydrocephalus (LPH) is a condition whereby ventricles are enlarged and the individual experiences severe dementia, inability to walk, and incontinence – despite very low intracranial pressure (ICP). [1] Low pressure hydrocephalus appears to be a more acute form of normal pressure hydrocephalus. If not diagnosed in a timely ...
[5] [11] DWM is the cause of around 4.3% of cases of congenital hydrocephalus [14] and 2.5% of all cases of hydrocephalus. [ 6 ] A 2017 review found that most patients (65%) were diagnosed with either "Dandy–Walker malformation" or "Dandy–Walker syndrome", while 20% were diagnosed with "Dandy–Walker variant" and 1.1% with "mega cisterna ...
However, any other compression, ischemia or damage to this region can produce these phenomena: hydrocephalus, midbrain hemorrhage, cerebral arteriovenous malformation, trauma and brainstem toxoplasmosis infection. Neoplasms and giant aneurysms of the posterior fossa have also been associated with the midbrain syndrome.
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Symptoms can be mild and nonspecific, including reduction of the stimulation effect, and can be confused for other causes of edema. [14] Thus, imaging is recommended to rule out other causes. [ 14 ] The condition is generally self-limiting and the exact mechanism of the cause is unexplained. [ 14 ]
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