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Noncommunicating hydrocephalus: Foramen of Monro obstruction
3rd ventricle tumors, colloid cyst, oligodendroglioma, central neurocytoma, giant cell astrocytoma in TS, ependymoma, suprasellar tumors;
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Noncommunicating hydrocephalus: aqueduct obstruction
congenital aqueductal stenosis, ventriculitis, IVH, tumor (mesencephalic, pineal, posterior 3rd ventricle region);
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Noncommunicating hydrocephalus: 4th ventricle obstruction
DW malformation, IVH, infection, subependymoma, exophytic brainstem glioma, posterior fossa tumors
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Communicating hydrocephalus:
meningitis (infectious, carcinomatous), SAH, surgery, venous thrombosis; NPH
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Cystic supratentorial congenital anomalies:
holoprosencephaly, hydrancephaly, aqueductal stenosis, callosal dysgenesis, porencephaly, arachnoid cyst, cystic teratoma, epidermoid/dermoid, vein of Galen AVM
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