[Extensive arterial anomaly in the spinal canal (Th5-S5) in a 3-year-old boy].

A case of an extensive arterial anomaly in the vertebral canal (Th5-S5) in a boy aged 3 years is described. Sudden onset of the disease with massive subarachnoid haemorrhage, loss of consciousness and signs of raised intracranial pressure suggested rather a lesion in the cranial cavity. The final diagnosis was made after myelography and spinal arteriography. In view of the extent of the lesion its radical removal was not possible. Embolization was done twice of the greatest vessels feeding the anomaly followed by decompression laminectomy. The patient is without neurological defects and pains. The case is reported in view of its rarity and atypical character of the lesion as well as its extent.