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Cleft spinal cord resulting from failure of the neural folds to close normally in the formation of the neural tube; inevitably spina bifida is a sequel.
[myelo- + G. schisis, a cleaving]
myeloschisis/my·elos·chi·sis/ (mi″ĕ-los´kĭ-sis) a developmental anomaly characterized by a cleft spinal cord.
Etymology: Gk, myelos + schisis, cleft
a cleft neural tube and an incompletely closed spinal cord.