ABSTRACT
Thromboembolism is one of the most common causes of death in cancer patients. Among
the most frequent thrombotic complications in patients with cancer are disseminated
intravascular coagulation, thrombotic thrombocytopenic purpura, and thrombocytosis.
Clearly, these complications arise as tumor cells interact with almost all components
of the hemostatic system including platelets. Platelets participate in tumor progression
by contributing to the metastatic cascade, protecting tumor cells from immune surveillance,
regulating tumor cell invasion, and angiogenesis. Platelets contain one of the largest
stores of angiogenic and mitogenic factors and the tumor vasculature is leaky, which
allows platelets to come in contact with the tumor and deposit multiple angiogenic
factors including vascular endothelial growth factor (VEGF) and thrombin to tumor
cells, which in turn contributes to tumor progression. This article reviews the recent
literature on how platelets contribute to tumor growth, angiogenesis, and metastasis.
KEYWORD
Platelets - cancer - metastasis - angiogenesis - integrins