There are two types of pelvic malignancies, one is primary tumors in the pelvis, such as osteosarcoma or chondrosarcoma, which are relatively common malignant tumors. There are also malignant tumors that metastasize to the pelvis, including those caused by lung cancer, kidney cancer, breast cancer, and tumors of hematologic origin such as myeloma. For patients suffering from pelvic malignant tumors, they need to maintain a good attitude and cooperate with doctors for active treatment, which will help them recover from the disease.