Metastatic tumor is a medical term that refers to the spread of cancer from one part of the body to another through the bloodstream or lymphatic system. This type of cancer is usually more aggressive than the primary tumor because it has already spread. There are several synonyms for metastatic tumor, including secondary tumor, advanced cancer, and stage IV cancer. Other terms used to describe this type of cancer include distant metastasis, disseminated disease, and metastatic carcinoma. Treatment options for metastatic tumors may include surgery, radiation therapy, chemotherapy, and targeted therapy. The prognosis for patients with metastatic cancer can vary depending on several factors, including the type of cancer, its location, and the extent of spread.