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Pneumorrhachis (PR), the presence of air in the spinal canal, is a rare but suggestive radiographic finding, associated to different aetiologies and possible pathways of air entry into the spinal canal. It can be divided into primary and secondary PR, descriptively classified into extra- or intradural PR and aetiologically subsumed into iatrogenic,(More)
The authors describe a patient with anomalous branches of the left internal carotid artery, "cross-over" duplication of its middle cerebral artery and agenesis of the contra-lateral internal carotid artery associated with two aneurysms successfully clipped. Pertinent literature is reviewed.
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