NCI Dictionary of Cancer Terms
The NCI Dictionary of Cancer Terms features 7,926 terms related to cancer and medicine.
Browse the dictionary by selecting a letter of the alphabet or by entering a cancer-related word or phrase in the search box.
- listen (HY-droh-neh-FROH-sis)
- Abnormal enlargement of a kidney, which may be caused by blockage of the ureter (such as by a kidney stone) or chronic kidney disease that prevents urine from draining into the bladder.