<unk>  affects the lower part of the brainstem. The central canal of the spinal cord may be widened. A fluid-filled lesion forms, known as a syrinx. This can vary in size significantly between patients. Nerve fibres may be compressed where they cross the midline, or in other parts of the spinal cord. Cranial nerves may be affected.<unk>  may be associated with syringomyelia, a syrinx limited to the spinal cord.
Syringobulbia
Microgyrus
Gnathophyma
Choroid
Pinguecula
Ulotaront
Ranula
Archagathus 