- SCM type 1 consists of two hemicords, each with its own dural sheath, separated by a bony or cartilaginous septum.
- SCM type 2 consists of two hemicords within the same dural sheath but separated by a fibrous septum.
Diastematomyelia in Adult
Q06.2 – Diastematomyelia
445308004 – Split spinal cord malformation
Differential Diagnosis & Pitfalls
- Diplomyelia – Duplication of the spinal cord, which can be distinguished from diastematomyelia by the presence of two central canals, each surrounded by gray and white matter.
- Spina bifida occulta
- Tethered cord
- Cauda equina syndrome
- Conus medullaris syndrome
- Lumbosacral radiculopathy
- Spinal cord infarction
- Spinal cord hemorrhage (see spinal cord compression)
- Spinal cord tumor (see spinal cord compression)
- Spinal cord lipoma
- Inflammatory spinal cord lesion (eg, transverse myelitis)
- Spinal cord infection
- Spinal cord abscess (paraspinal, epidural)