To the Editor.—
With regard to the report of Dr Caroscio and his colleagues, several additional points with regard to the incidence, recurrence rate, and mortality from spinal subarachnoid hemorrhage due to vascular malformations are of clinical significance.I reviewed some 421 published cases of spinal angioma,1 including 60 cases seen at the National Hospital in London. Subarachnoid hemorrhage occurred in 53 (12.6%), an incidence similar to the 10% quoted by Aminoff and Logue2 in those 60 cases and to the 11.3% quoted by Newman.3 There was a higher incidence in female (22%) than male patients (8%) with angiomas, and in patients with cervical malformations (42%) than in those with more caudally situated lesions (20% in those with a thoracic lesion, 11% in those with a thoracolumbar lesion). More than half of the angiomas that bled had done so at least once before patients were 20 years old, and the
Aminoff MJ. Siderosis and Subarachnoid Hemorrhage. Arch Neurol. 1981;38(1):67. doi:10.1001/archneur.1981.00510010093028
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