Cronqvist S, Thulin C A
Acta Radiol Diagn (Stockh). 1979;20(4):561-8. doi: 10.1177/028418517902000401.
At lumbar myelography, tortuous filling defects frequently occur in the presence of a marked local narrowing of the spinal canal. This may lead to a displacement and compression of nerve roots, which may partially or completely fill the subarachnoid space. However, truly elongated nerve roots have also been observed, both at myelography and at operation. Such elongation appears to be a congenital malformation. The recognition of the true nature of tortuous filling defects is important with regard to differentiation against arteriovenous malformations and congested veins.
在腰椎脊髓造影时，当椎管出现明显局部狭窄时，常可见到迂曲的充盈缺损。这可能导致神经根移位和受压，神经根可能部分或完全占据蛛网膜下腔。然而，在脊髓造影和手术中也观察到了真正的神经根拉长。这种拉长似乎是一种先天性畸形。认识迂曲充盈缺损的真实性质对于鉴别动静脉畸形和充血静脉很重要。
