MR findings in cerebellar ataxia after enteric fever.

A patient with acute cerebellar ataxia after enteric fever is described. MRI showed multiple hypointense areas in the subcortical areas of the cerebellum on T1-weighted images, and T2-weighted images showed hyperintense lesions in the corresponding areas. Based on these findings, the possible mechanisms of ataxia are discussed.

Cerebral infarction after envenomation by viper.

A case of cerebral infarction after viper bite is described; the patient also had features of diffuse encephalopathy. Findings on MRI were suggestive of subacute hemorrhagic infarcts. Possible mechanisms for cerebral infarction in these circumstances were discussed. The mechanism of cerebral infarction in this case seemed to be vasospasm due to the action of the toxin, hemorrhagin, present in the venom.

Neurological complications of varicella inflection : a clinical, electrophysiological and MRI study.

Twenty three cases of neurological complications following varicella infection are reported. These include pre rash seizures (2), encephalomyelitis (12), Guillain-Barrel syndrome (GBS) (7) and cranial neuropathy (2). There were 3 cases of encephalitis form, 7 cases of cerebellar form and 2 cases of pure myelitic form of the 12 cases of encephalomyelitis. There were no distinct clinical or electrophysiological features which serve to distinguish the GBS seen in association with varicella infection from that seen in other clinical settings. Lack of white matter lesions on magnetic resonance imaging in acute cerebellar ataxia following varicella infection may suggest probably different pathogenic mechanisms in this form of encephalitis when compared to cerebral form.

Prospective study of cortical sinovenous thrombosis value of CT scan and imaging.

Forty two consecutive cases of cortical sino venous thrombosis (CSVT) diagnosed by computerised tomographic scan (CT scan) and or magnetic resonance imaging (MRI) constituted the study material. Clinical features are similar despite of varied aetiology. Stroke like presentation was seen in 20 (48 percent) patients, features of raised intracranial pressure were seen in 14 (33 percent) patients and the remaining presented with diffuse encephalopathic features. No definitive aetiological factor could be found in 7 (17 percent) patients. Main CT scan features included empty delta sign (43 percent), cord sign (31 percent) and haemorrhagic or non haemorrhagic infarcts (62 percent), and CT scan was non diagnostic in 6 (14 percent) patients. The MRI imaging features included hyperintense signals in the sinuses more often in sagittal sinus with or without haemorrhagic infarct.

Extramedullary glioma of the cervicodorsal spinal cord--a case report.

Extramedullary gliomas are rare and usually have an intramedullary component. A case of extramedullary astrocytoma without intramedullary mass in an adolescent girl has been reported.

Multiple meningiomas.

True "multiple meningiomas" as defined by Cushing are rare. A case of multiple meningiomas without stigmata of neurofibromatosis, in a 53 year old man, treated surgically is reported. The relevant literature on multiple meningiomas has been reviewed.