A stent is a tiny tube placed into a hollow structure in your body. This structure can be an artery, a vein, or another structure, such as the tube that carries urine (ureter). The stent holds the structure| medlineplus.gov
Magnetic resonance imaging (MRI) uses a large magnet and radio waves to look at organs and structures inside the body. Read about the use of MRI scan.| medlineplus.gov
X-rays are a type of electromagnetic radiation, just like visible light.| medlineplus.gov
A tumor is an abnormal growth of body tissue. Tumors can be cancerous (malignant) or noncancerous (benign).| medlineplus.gov
