| Since the aorta and the pulmonary artery develop from a common conus arteriosus, irregular and imperfect development of the septum between them may also produce variations. |
| The spinal cord terminates in the conus medullaris and cauda equina. |
| Lumbar puncture and subarachnoid blocks are commonly performed below the vertebral level at which the conus medullaris is expected to be located. |
| Magnetic resonance imaging showed spondylitis and diskitis of L1 through L3, causing compression of both cauda equina and conus, as well as bilateral psoas abscesses. |
| The conus arteriosus too begins to be divided into two chambers, and in Protopterus this division is complete. |
| A case of tethered cord syndrome in the conus medullaris together with an intradural intramedullar tumor seen in an 8-year-old female patient is presented and discussed here. |
