High density nodular shadow in thoracic vertebrae is a description of thoracic vertebrae in CT examination, and the causes of corresponding conditions mainly include bone island and metastatic tumor. 1. Bone island: Bone island in thoracic vertebrae, that is, intraosseous osteoma, will show corresponding changes, which is a benign lesion and will not cause obvious symptoms, and basically will not change in the process of rechecking. 2. Metastatic tumor: some bone metastases of lung cancer will also present as high-density foci, usually accompanied by bone destruction, which will be enlarged in the process of review, and in serious cases, there will be soft tissue mass shadow. If you have lung cancer and find high-density nodules in thoracic vertebrae in the process of review and accompanied by obvious chest pain, you need to consult a doctor for diagnosis in time and carry out standardized treatment under the guidance of a clinician, so as to avoid delaying your condition.