Breast cancer rib metastasis can be manifested as pain in the ribs, and costochondritis can also be pain or pressure pain in the ribs, how to identify the two, mainly from the CT above and bone scanning and other tests to identify. If there are obvious filling defects and bone destruction found on CT, the possibility of rib metastasis of breast cancer is considered high, while if the ribs are only blurred and there is no obvious bone destruction, costochondritis is more likely. PET-CT examination can also be done, if it is rib metastasis, usually there will be obvious high metabolic uptake, while the PET-CT of costochondritis will only have mild metabolic increase. Of course, the diagnosis is mainly based on pathological examination, such as puncture biopsy of the soft tissue mass of the rib cage, find cancer cells, can be diagnosed as breast cancer rib metastasis, while costochondritis is mainly inflammation, redness, swelling, heat and pain is obvious, and if you do the puncture, most of them are lymphocytes or neutrophils.