Causes of hydrocephalus

The main causes of hydrocephalus include congenital malformation, infection factors, hemorrhage and tumor, other causes. 1. Congenital malformation In the process of fetal development, if there is stenosis of the midbrain aqueduct, bifurcation, diaphragm formation, or interventricular foramen atresia malformation, the fourth ventricle median foramen or lateral foramen atresia, etc., it will lead to cerebrospinal fluid circulation obstruction, and then cause hydrocephalus. This is due to congenital developmental abnormalities, so that the normal flow of cerebrospinal fluid channel structural problems.2. infectious factors When purulent meningitis, tuberculous meningitis, ventriculitis and other infections occur, inflammatory exudates may block cerebrospinal fluid circulation channels, or cause subarachnoid adhesion, thus inducing hydrocephalus. A series of pathological changes caused by infection interfere with the normal circulation and absorption of cerebrospinal fluid. 3. After intracranial hemorrhage, blood can accumulate in the ventricular system or subarachnoid space, forming blood clots, blocking the circulation path of cerebrospinal fluid, especially neonatal birth injury, intracranial hemorrhage and other conditions are easy to lead to hydrocephalus. The coagulation reaction after hemorrhage and some subsequent changes become important factors in the formation of hydrocephalus.4. Tumors Intracranial tumors can block the circulation of cerebrospinal fluid, such as tumors near the fourth ventricle, choroid plexus papilloma, etc., resulting in excessive secretion of cerebrospinal fluid or circulation and absorption disorders, causing hydrocephalus. Hydrocephalus may be caused by the presence of tumor, whether physical obstruction or influence on cerebrospinal fluid secretion. 5. Other causes Some genetic diseases, side effects of some drugs, and cerebrospinal fluid absorption disorders after brain trauma may also lead to hydrocephalus. These conditions are relatively rare, but they are also factors that cannot be ignored under certain circumstances.