Bone metastasis is one of the common complications of malignant tumors, and the more common bone metastases are as follows: 1. Breast cancer bone metastasis Breast cancer is one of the tumors most prone to bone metastasis, and it occurs more often and earlier, and the age of onset is relatively young. 2. Bone metastasis of prostate cancer Prostate cancer also has high incidence of bone metastasis, most of which are osteogenic changes, and the site of metastasis is most common in pelvic bone, followed by lumbar vertebrae, thoracic vertebrae, cervical vertebrae, trochanter of femur, ribs and sternum. Lung cancer bone metastasis occurs mostly in male, and the age is more than 50 years old. Lung cancer bone metastasis occurs in ribs, spine, pelvis and skull, followed by humerus and femur, and there are also metastases to tibia, fibula, ulna, radius and foot bones. The destructive foci are single or multiple, most of them are osteolytic destruction, with fuzzy edges, and the cortex of the bone is often destroyed. Osteogenic metastasis of lung cancer is rare, which is manifested as spotted or flocculent hyperdense shadow, with density ranging from hairy glassy to ivory-like, and soft tissue mass in some patients, generally without periosteal reaction. Bone metastasis of renal cancer can be seen in femur, humerus, spine, pelvis, ribs, etc. It is often single, with osteolytic destruction, slightly swollen bone, which can erode and destroy bone cortex, and pathological fracture can occur. There are bony intervals in the bone defect area, which is quite similar to primary renal tumor, or sclerosis type, or extensive multilayer periosteal reaction. Bone metastasis of thyroid cancer As the malignant degree of thyroid cancer varies greatly, the clinical and X-ray performance of bone metastasis of thyroid cancer is relatively special. Because the malignant degree of thyroid cancer varies greatly, the clinical and X-ray manifestations of thyroid cancer bone metastasis are quite special. The degree of osteolytic destruction of thyroid cancer bone metastasis foci is often very serious, and the incidence of pathologic fracture is very high. Doctor’s tips: other cancers may also have bone metastasis, so for cancer patients, follow-up is very important. Regardless of whether there is bone pain or not, there should be regular follow-up and systematic examination. When bone destruction occurs in patients with a history of primary malignant tumor, the possibility of bone metastases should be highly suspected.