• A deformation of tissues or organs by an external force (e.g., fractures, tumors, blood clots, abscesses, etc.).
  CDISC Terminology
  Clinical Data Interchange Standards Consortium (CDISC), 2021
• 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).
  NCI Dictionary of Cancer Terms
  U.S. National Cancer Institute, 2021
• Squeezing together; the exertion of pressure on a body in such a way as to tend to increase its density; the decrease in a dimension of a body under the action of two external forces directed toward one another in the same straight line.
  CRISP Thesaurus
  National Institutes of Health, 2006
• The act, process, or result of pressing together, flattening, or condensing, particularly, increasing an external physical pressure on a body structure. Also refers to the reduction in the volume of a body or substance and augmentation of its density due to pressure.
  NCI Thesaurus
  U.S. National Cancer Institute, 2021