Spinal cavernous disease is a chronic progressive disorder involving the spinal cord and is a congenital developmental abnormality of the spinal cord with cavity formation. The clinical features are muscle atrophy, loss of pain and temperature sensation in the corresponding segment, preservation of tactile and proprioceptive sensation, limb paralysis and nutritional impairment. A patient with cervicothoracic spinal cord cavitation was admitted to the Fifth Clinical Hospital of Jiamusi University. Twenty years ago, the patient developed numbness and sensory loss in the right limb without any apparent cause, dizziness, headache, convulsions and incontinence, without systematic treatment, and the symptoms gradually worsened. Six years ago, a cervical spine MRI was done at the Second Hospital of Harbin Medical University, and the diagnosis was spinal cavernous disease, which was not treated by surgery. Two years ago, the symptoms of numbness and hypesthesia of the right limb began to increase, accompanied by weakness, and the right shoulder and upper limb were repeatedly crushed and burned, but did not notice. After examination, the patient saw multiple scald scars on the right shoulder and upper limbs, muscle atrophy of both hands, which was obvious on the right side, contracture deformity of the right finger joints, weakness of the split fingers, hyperalgesia of the right limb, loss of pain and temperature sensation above the umbilical level, muscle strength of the right limb at level 4+ and level 5 on the left side, hyperactive tendon reflex on the right side, and positive ankle clonus. After routine examination, Li Jun, director of neurosurgery, and Ding Yifu, deputy director of neurosurgery, thought that surgery was feasible, and in collaboration with Fan Tao, director of Beijing Sanbo Brain Hospital, they successfully performed a spinal cavotomy and thoracic bypass for the patient, the first of its kind in the city. After the operation, the patient’s condition was stable, and the symptoms of numbness and hypesthesia of the right limb improved, and he was discharged from the hospital. The patient has recovered well and the cavity has disappeared after more than one year of follow-up.