Chordomas are locally aggressive or malignant tumors that are common epidural tumors involving the slope and sacrococcygeal region, formed by embryonic remnants or ectopic notochord. These tumors can occur anywhere along the mid-axis of the spine, but are most common on the oral side of the slope and sacrococcygeal region. The notochord is a degenerated tissue in humans and other higher vertebrates. Although chordoma grows slowly and rarely metastasizes distantly (it can metastasize in advanced stages), it is still a malignant tumor because it is very destructive locally, endangers the body as the tumor continues to grow, and is highly susceptible to recurrence after surgery. Symptoms: The onset of chordoma is mostly in middle age or older, and the first symptom is pain in the sacrococcygeal region. The vast majority of intravertebral chordomas tend to experience associated symptoms for months to years prior to diagnosis. If the tumor occurs in the sacrococcygeal region, sacrococcygeal pain is often the main symptom, and if the tumor is large, constipation, urinary disturbance, and numbness or pain in the lower extremities and buttocks may occur; if the tumor occurs in other parts of the spinal canal, localized pain in the corresponding area is a common symptom. If the tumor occurs in the lower slope and craniocervical junction, headache, pain in the occipital or occipitocervical junction area are the common symptoms, which can be aggravated when the head position is changed. It may even cause pulmonary pleural irritation symptoms. When examined clinically, sacral chordoma can be seen as a full sacral area, and the tumor can be palpated on anal examination as round, smooth, and somewhat elastic. Prevention: Chordoma has a low chance of metastasis. Metastasis occurs more often in chordoma located in the sacrococcygeal region, but rarely in tumors of the skull base and spine above the sacral spine. Metastases usually occur 10 years after the tumor has developed, and local lymph nodes are often involved, followed by blood flow to the lungs, liver, and peritoneum. Chordoid chordoma with a rich cartilaginous component in the occipital region has a better prognosis than the common chordoma.