If there is any possibility of cancer, you need to see a doctor for a definite diagnosis and to test for distant metastases of cancer. CT scan: A special type of X-ray test to see if cancer has metastasized to the liver, lungs, or other organs, CT can also help with biopsies; Ultrasound: Images can also be seen, such as looking at an unborn baby in a pregnant woman’s womb, and is often used to find tumors and identify distant metastases; MRI scan. This test uses radioactive waves and a strong magnetic field instead of X-rays, and is often used to detect brain tissue and spinal cord; chest X-rays: to detect tumors that have metastasized to the lungs; PET scan: this test, in which a special type of sugar is fed into the body that can be visualized, shows the sugar in the tumor tissue as a “hot spot” and is then detected when the doctor suspects that the patient has had a distant metastasis but does not know which organ has metastasized. This test can be used when the doctor suspects that a patient has metastasized distantly but does not know which organ has metastasized, but it is more expensive.