Neurocysticercosis is the most common parasitic disease affecting the human central nervous system, with protean clinical manifestations. During the last 17 years, 153 cases of neurocysticercosis were histopathologically diagnosed on surgically resected and autopsied material. Variable number of cysts, from a solitary one to multiple were found invading different parts of the neuraxis (118 cases). These cestode larval forms had a prediliction for locating in the cerebral grey matter (98 cases), followed by subcortical nuclear area (12), cerebral ventricles and subarachnoid cisterns (26 cases). Patients harbouring parenchymal cysts manifested predominantly with seizures and encephalitis (113 cases) whereas those with ventricular and/or cisternal cysts presented with features of chronic meningitis and hydrocephalus. The unusual clinical presentations were psychiatric symptoms with behavioural abnormalities and stroke in the young as a result of cysticercal meningitis with associated arteritis. Primary cysticercal abscess in the brain parenchyma was an interesting pathological feature noted in 3 cases. In the endemic areas, the co-existence of neurocysticercosis appears to enhance the morbidity and mortality due to Japanese encephalitis (31 cases) . The surface glycoprotein of the cysticercal cyst has been identified to be the antigenic component to which the host immune system responds by forming antibody in the CSF. MJAFI 1998; 54: 13-18
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