The condition of compression that has fluid-filled cavities that grow in the spinal cord and compress nerves that detect pain and temperature is called .

The condition you are referring to is known as syringomyelia. In this neurological condition, a cyst or cavity (syrinx) forms within the spinal cord, often filled with cerebrospinal fluid. This syrinx can expand and damage the spinal cord's fibers, leading to symptoms such as pain, weakness, and loss of temperature sensation, particularly in the upper body. Syringomyelia is often associated with other conditions, such as chiari malformation, where brain tissue extends into the spinal canal. Treatment options may include monitoring the condition, medications to manage symptoms, or surgery to address the underlying causes or relieve pressure on the spinal cord.