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Pronunciation: ra-kis'ki-sis


  1. Embryologic failure of fusion of vertebral arches and neural tube with consequent exposure of neural tissue at the surface; spina bifida cystica with myelocele or myeloschisis.
  2. Spinal dysraphism.

[G. rhachis, spine, + schisis, division]

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.