Eleven cases of cerebral hydatid cyst, diagnosed by computerized tomography (CT), are presented. The importance of CT in minimizing the possibility of accidentally tapping or tearing the cyst membrane is stressed. Repeat CT scanning after removal of the cyst revealed atrophy in the affected hemisphere.

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In this paper a patient with primary multiple extradural hydatid disease is described. He had no neurological deficits, although there were numerous hydatid cysts located at the thoracic 7-9 level extradurally. Nuclear magnetic resonance (NMR) was used for what would appear to be the first time for the diagnosis of spinal hydatid disease.

Horner's syndrome may be caused by a lesion anywhere along the three-neuron pathway from the hypothalamus to the eye. This syndrome has been reported secondary to numerous causes to date. In this paper, we describe an extremely rare case of Horner's syndrome due to jugular venous extasia demonstrated by computed tomography and intravenous digital subtraction angiography.

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