Whether the 3cm round-like shadow on the right margin of lumbar 1 is serious or not can’t be generalized, it may be caused by spinal tuberculosis, lipoma, or spinal tumor, the first two cases are usually not serious, and the last one is different according to the benignity and malignancy of the tumor, and the severity is also different. 1. Spinal tuberculosis: spinal tuberculosis is a kind of tuberculosis that occurs in vertebrae, if tuberculous abscess is formed in the side of cone, it can lead to the manifestation of 3cm round-like shadow in the right margin of lumbar 1, this kind of situation is usually not serious, and it can be treated with anti-tuberculous drugs or surgery. 2. Lipoma: if a lipoma grows in the right 3 cm of the first lumbar vertebra, it can also show 3 cm of round-like shadow on the right margin of lumbar 1. Lipoma belongs to benign tumors, which is not serious, and asymptomatic lipoma usually does not need to be treated, but if the lipoma is too big or uncomfortable, surgical resection can be performed. 3. Spinal tumor: spinal tumor is a kind of primary tumor or metastatic tumor occurring in the spine, which can also lead to the manifestation of 3 cm round-like shadow on the right margin of lumbar 1 during the examination. The prognosis of this disease is related to the benignness and malignancy of the tumor, primary spinal tumor may be benign or malignant, and metastatic spinal tumors are mostly malignant, and the degree of severity should depend on the specific situation. In addition to the above reasons, other factors may also lead to the 3 cm round-like shadow on the right margin of lumbar 1. It is recommended to consult the doctor as soon as possible, complete the relevant examinations to find out the reasons and follow the doctor’s instructions to carry out targeted treatment to avoid delaying the condition.