| Namespace | MPheno.ontology | Obsolete | false |
| description | 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 |