NCI Dictionary of Cancer Terms
The NCI Dictionary of Cancer Terms features 7,913 terms related to cancer and medicine.
- listen (kum-PREH-shun)
- A pressing or squeezing together. In medicine, it can describe a structure, such as a tumor, that presses on another part of the body, such as a nerve. It can also describe the flattening of soft tissue, such as the breast, that occurs during a mammogram (x-ray of the breast).