Dictionary

tumor: An abnormal growth of cells. Tumors can be benign (non-cancerous) or malignant (cancerous).
 
ultrasound: An imaging method in which high-frequency sound waves are used to outline a part of the body.
 
urine: The waste products filtered from the blood and combined with excess water by the kidneys. Urine exits the body through the urethra.
 
X-ray: High-energy radiation that can be used at low levels to diagnose disease or at high levels to treat cancer.