diastematomyelia as a child of spina bifida occulta [MP:0005297]
DEF: a rare congenital anomaly that results in the "splitting" of the spinal cord in a longitudinal direction, usually at the level of the upper lumbar vertebra; this condition occurs in the presence of an osseous (bone), cartilaginous or fibrous septum in the central portion of the spinal canal which then produces a complete or incomplete sagittal division of the spinal cord into two hemicords, each half being surrounded by a dural sac; when the split does not reunite distally to the spur, the condition is referred to as a diplomyelia
DEF: true duplication of the spinal cord; each cord has two dorsal and two ventral horns and paired nerve roots, but the two cords are contained within a single dural sac
SYN: twinning of the spinal cord
spinal cord degeneration
DEF: a retrogressive impairment of function or destruction of the spinal cord
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