NCI Dictionary of Cancer Terms The NCI Dictionary of Cancer Terms features 8,091 terms related to cancer and medicine. The search textbox has an autosuggest feature. When you enter three or more characters, a list of up to 10 suggestions will popup under the textbox. Use the arrow keys to move through the suggestions. To select a suggestion, hit the enter key. Using the escape key closes the listbox and puts you back at the textbox. The radio buttons allow you to toggle between having all search items start with or contain the text you entered in the search box. Starts with Contains Browse: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # mammography listen (ma-MAH-gruh-fee) The use of film or a computer to create a picture of the breast. More Information Breast Cancer Enlarge Mammography. The breast is pressed between two plates. X-rays are used to take pictures of breast tissue.