NCI Dictionary of Cancer Terms
The NCI Dictionary of Cancer Terms features 7,899 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 (MY-kroh-KAL-sih-fih-KAY-shun)
- A tiny deposit of calcium in the breast that cannot be felt but can be detected on a mammogram. A cluster of these very small specks of calcium may indicate that cancer is present.