This disease is a benign bone disease. The appearance of the diseased vertebra is cystic and the cyst cavity is filled with blood, so this disease is called arterial bone cyst. Its nature is unclear. Some people think it is a benign tumor, while others think it is a tumor-like lesion. This disease rarely occurs in the cervical spine. According to literature reports, aneurysmal bone cysts of the entire spine account for about 4% of spinal tumors. The age of onset is mostly 10 to 20 years old, and there is no difference between men and women. The cause of this disease is still unknown. It can be primary, or it can be secondary or accompanied by giant cell tumor of bone, chondroblastoma or osteoblastoma. This disease occasionally has a tendency to malignancy.