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Related Concept Videos

Venous Thrombosis I: Introduction01:30

Venous Thrombosis I: Introduction

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Venous thrombosis, the most common disorder of the veins, involves the formation of a thrombus or blood clot associated with vein inflammation. It can be classified as either superficial vein thrombosis or deep vein thrombosis.Superficial Vein Thrombosis: This involves the formation of a thrombus in a superficial vein, usually the greater or lesser saphenous vein. Though less severe than deep vein thrombosis (DVT), SVT can lead to complications if untreated.Deep Vein Thrombosis (DVT): This...
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Hemostasis is a crucial process that prevents excessive blood loss from damaged blood vessels. It involves various mechanisms such as vasoconstriction, platelet adhesion and activation, and fibrin formation. The importance of each mechanism depends on the type of vessel injury. In contrast, thrombosis is the abnormal formation of a blood clot within the blood vessels, leading to potential complications if the clot obstructs blood flow. Thrombosis can be caused by increased coagulability of the...
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Clot Retraction and Fibrinolysis01:16

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After a fibrin clot is formed, the next step is clot retraction, a vital process facilitated by platelet contractile proteins, such as actin and myosin. These proteins pull the fibrin strands closer together and condense the clot. This action reduces the size of the clot, creating a smaller, denser structure that effectively seals off the damaged vessel. Clot retraction consolidates the clot and helps with wound healing by bringing the edges of the damaged blood vessel closer together.
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Coagulation01:09

Coagulation

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The coagulation phase is a critical part of the body's process to prevent blood loss following injury to blood vessels. It involves chemical reactions that form a clot to seal the injured area. The clotting process begins shortly after injury, within 15-20 seconds for severe damage and 1-2 minutes for minor injuries.
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Pulmonary Embolism I: Introduction01:29

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Pulmonary embolism (PE) occurs when a thrombus, fat or air embolus, amniotic fluid, or tumor tissue blocks one or more pulmonary arteries. These blockages originate in the venous system or the right side of the heart.EtiologyPE primarily arises from deep vein thrombosis (DVT) and other hypercoagulable states, such as inherited thrombophilias. Additional etiological factors include venous stasis, commonly seen in obesity, and endothelial injury from surgery and trauma. Less common causes include...
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Disorders of Hemostasis01:24

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Hemostasis, the process that stops bleeding after a blood vessel injury, is crucial for maintaining the integrity of the circulatory system. However, disorders of hemostasis can disrupt this delicate balance, leading to either excessive clotting or bleeding. These disorders can be broadly classified into thromboembolic disorders and bleeding disorders.
Thromboembolic Disorders
Two factors primarily cause thromboembolic conditions.
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Understanding clot composition in cancer-associated thromboembolism.

Beatrice Dell'Acqua1, Francesca Pia Colombo2, Simone Vidale1

  • 1Neurology Department, ASST Sette Laghi, Sede di Varese, Varese, Italy.

Journal of Cerebral Blood Flow and Metabolism : Official Journal of the International Society of Cerebral Blood Flow and Metabolism
|March 25, 2026
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Summary

Cancer patients experiencing stroke often have clots enriched with platelets and fibrin. Tumour cells can be found within these clots, but inflammatory signatures require further study for better cancer-stroke treatment strategies.

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Area of Science:

  • Oncology
  • Vascular Medicine
  • Neurology

Background:

  • Cancer poses significant risks for vascular complications, including ischemic stroke.
  • Cancer-associated vascular occlusions result from complex clinical and biological factors.
  • Clot composition in cancer-related stroke is influenced by tumor type and disease stage.

Purpose of the Study:

  • To review clinical and biological factors promoting vascular occlusions in cancer patients.
  • To examine the cellular and molecular composition of cancer-associated clots in stroke.
  • To identify research gaps and future directions in cancer-related clot composition studies.

Main Methods:

  • Narrative review of existing literature.
  • Analysis of histopathological studies on cerebral arterial clots.
  • Examination of case reports and small series on cancer patients with stroke.

Main Results:

  • Cancer-associated clots in stroke show a higher proportion of platelets and fibrin compared to non-cancer clots.
  • Tumor cells or fragments are frequently detected within cerebral arterial clots of cancer patients.
  • Inflammatory components within cancer-related thrombi are not well-characterized.

Conclusions:

  • Understanding cancer-associated clot composition is crucial for refining knowledge of these vascular events.
  • Further research into clot composition may guide improved diagnostic and therapeutic strategies for cancer patients experiencing stroke.