The presence of a cystic lesion in the thoracic spine will produce different clinical symptoms depending on the location of the cyst. If the cyst is located outside the spinal canal, such as a cyst located in the vertebral body or a cyst in the spinal appendage, there are generally no obvious clinical symptoms, with some patients showing localized pain. If the cyst is located within the spinal canal, it usually produces symptoms of spinal cord compression due to the narrower spinal canal and smaller reserve space in the thoracic spine. This can be manifested as pain and numbness along the intercostal nerves in the corresponding segment, as well as pain, numbness, weakness, unsteadiness in walking, a feeling of stepping on cotton, and hyperactive tendon reflexes in the distal lower limbs by compressing the spinal cord segment. If the compression is more severe, spastic paraplegia of the lower extremities may also be complicated.