Fatty density shadows seen in the spinal canal at the corresponding level of the L2-3-4 vertebrae are a descriptive diagnosis of a lesion on CT examination, suggesting the presence of a fatty lesion or other lesion with a similar fat density. The presence of abnormal density in the vertebral canal at the level of the L2-3-4 vertebral body on CT examination is suggestive of fat density shadows when compared with the density of surrounding tissues and when the CT value is measured to show a range of fat densities; clinically, such lesions are commonly seen in neurosphincteric neoplasms, lipomas, teratomas, and lipoatrophic terminal filaments, and need to be judged in conjunction with the condition of adjacent tissues and clinical symptoms. The appearance of the corresponding density, mainly to determine whether the accompanying nerve compression symptoms, no symptoms can be under the guidance of the clinician for regular review, without too much intervention, compression symptoms caused by pain, limb activity is limited, can be prescribed for surgical treatment.