• Obstruction of a blood vessel (embolism) by a blood clot (THROMBUS) in the blood stream.
  NLM Medical Subject Headings
  U.S. National Library of Medicine, 2025
• Occlusion of the lumen of a vessel by a thrombus that has migrated from a distal site via the blood stream.
  NCI
  U.S. National Cancer Institute, 2021
• The formation of a blood clot inside a blood vessel that subsequently travels through the blood stream from the site where it formed to another location in the body, generally leading to vascular occlusion at the distant site.
  Human Phenotype Ontology (HPO)
  The Human Phenotype Ontology Project, 2025
• (thromboembolic event) A disorder characterized by occlusion of a vessel by a thrombus that has migrated from a distal site via the blood stream.
  Common Terminology Criteria for Adverse Events
  U.S. National Institutes of Health, 2021
• Thromboembolism encompasses two interrelated conditions that are part of the same spectrum, deep venous thrombosis (DVT) and pulmonary embolism (PE) (see the image below). The spectrum of disease ranges from clinically unsuspected to clinically unimportant to massive embolism causing death.
  Medscape
  WebMD, 2025