Crestal tuberculosis, also known as Pott’s disease, is a secondary lesion that is about 90% secondary to tuberculosis. Route of transmission: The majority of the disease is transmitted through the bloodstream. Prevalence: It is most common in children and adolescents, with 80% of those under 30 years of age. Crestal spine tuberculosis imaging 1, X-ray manifestations of vertebral bone destruction, narrowing of the intervertebral space, angular deformity and cold abscess formation, the lower thoracic and upper lumbar vertebrae are most common, often involving 2~3 vertebrae connected, the lesion of osteolytic destruction is dominant, and bone proliferation and sclerosis is not obvious. 2, CT scanning shows that the disease is mainly caused by osteolytic destruction, and bone proliferation and sclerosis is not obvious. CT scan shows that the cancellous bone of the vertebral body is destroyed, the bone cortex loses integrity, and dead bone and slight bone proliferation and collapse can be seen; the intervertebral disc is relatively intact in the early stage, but it is destroyed later, and the gap is narrowed, and the abscess is in the form of a single room or multiple rooms. MRI has early diagnostic value, and it can show abnormal signals in the stage of inflammatory infiltration, and it can also be used to observe the crural marrow with or without compression and degeneration. Differential diagnosis: 1) Borrelia burgdorferi crematorium 2) Septic crematorium Vertebral tuberculosis can be classified into two types according to the location of vertebrae: (1) central type, which is mostly seen in children, with foci in the center of cancellous bone of vertebrae, often with dead bone and cavities, and it is easy to invade the whole vertebral body and intervertebral discs due to the small size of vertebral body and the rapid progression of the lesion. Bone destruction of the central type is concentrated in the center of the vertebral body, which is clearer in the lateral view. The vertebral body soon appears to compress into a wedge shape, narrowing anteriorly and widening posteriorly. It can also invade to the intervertebral disc and involve the neighboring vertebrae. (2) Marginal type starts from the right and left sides of the upper and lower margins of the vertebral body and the anterior and posterior sides, and pathologic compression fracture may occur when the diseased vertebra is compressed. The compression of the anterior margin is mostly wedge-shaped, and the bone marrow fragments or dead bones may be extruded into the vertebral canal to compress the crural cord or the nerve root. In the borderline type, the bone destruction is concentrated at the upper or lower edge of the vertebral body, and soon invades the intervertebral discs, showing destruction of the vertebral endplates and progressive intervertebral space narrowing, and involves the two neighboring vertebrae. The bone destruction and wedge-shaped compression of the marginal type are not as obvious as that of the central type, so the lordosis is not as severe.