Tumors of infective origin include tuberculoma and Neurocysticercosis (hydatid cysts). Cerebral tuberculoma varies in size from a small nodule to a large mass and is present in sub cortical rather than subtentorial region.There is often caseation present in the center of the growth.
Patient generally presents with seizures and features of raised intracranial tension. History of previous infection with tuberculosis is generally available. Diagnosis is made by CT scan and MRI. Treatment is by anti tubercular therapy.
Neurocysticercosis is the most common parasitic disease. Brain being infected in more than 5% of cases of Hydatid disease. It is a pleomorphic disease which causes several neurological syndromes and pathological lesions. The cysts usually occupy greater part of substances of the brain (cerebral hemisphere) or lie within the ventricles.
Cysts varying in size are commonly found in the sub arachnoid space and the cerebral cortex may be studded with them. These may also occur in other parts of the brain like basal ganglia and fourth ventricle. Symptoms mainly consist of seizures. Diagnosis is made by demonstration of cysticeric in the subcutaneous tissue muscles.
When these calcify these shall be seen on X-ray film. Further confirmation is by CT Scan. Treatment is by either praziquantel or albendazole. Both drugs are useful. For severe brain swelling, steroids are administered before instituting anticysticercal dmgs.
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