The patient was middle-aged, female, 35 years old, previously fit. Complaint: Numbness of both lower limbs for 5 years, aggravated with fatigue for 3 months. History: 5 years ago, the patient had numbness in both lower limbs without any obvious cause, hyperalgesia, the right side was heavier than the left side, which was persistent and not relieved after resting, and the above symptoms were aggravated in the past 3 months, accompanied by weakness in both lower limbs, unsteady walking, accompanied by numbness in the saddle area of the buttocks, accompanied by pain in the back of the chest, which was paroxysmal and sharp, accompanied by urinary effort, no unconsciousness obstacle, no dizziness, headache and no stool abnormality, and the effect of out-of-hospital physiotherapy was unsatisfactory, and she came to the hospital in search for a clear diagnosis and treatment. In order to seek a clear diagnosis and treatment, he came to the hospital for consultation, and was admitted to our department as an outpatient with the diagnosis of “intraspinal tumor”. Since the onset of the disease, he had poor mental health, normal bowel movement, difficulty in urination, acceptable diet and sleep, and no obvious change in weight. Examination: muscle strength of the left lower limb was grade IV, muscle strength of the right lower limb was grade IV; muscle tone was normal; bilateral hyperalgesia below the 10th thoracic dermatome; pain sensation below the right knee joint disappeared, and was heavier on the right than on the left; bilateral knee tendon reflexes and ankle reflexes were weakened; two-point discrimination sensation of the lower limbs disappeared, and positional sensation disappeared; pathological signs of both lower limbs were negative. MRI showed: below cervical 5 —- thoracic 11 spinal cord cavity, thoracic 12 —- lumbar 1 spinal cord was equal, mixed T1, T2 signals, localized was enhanced after enhancement. Diagnosis: thoracic 12-lumbar 1 vertebral level intraspinal vascular reticulocytoma Treatment: posterior median approach surgery to remove the tumor. Intraoperatively, the tumor was orange in color, located in the dorsal part of the spinal cord, closely adhered to the spinal cord, with several draining veins located in the dorsal part of the spinal cord, and the artery supplying blood was the anterior spinal cord artery. The tumor was resected completely, and the size of the tumor was about 1.2*1.2*3.2cm. After the operation, the patient’s muscle strength of both lower limbs improved significantly, the numbness was reduced, and the pain sensitivity of both lower limbs appeared in the early stage, and then returned to normal in the late stage.