Thrombotic episodes represent the second cause of mortality in cancer
patients. These complications are more frequent with some adenocarcino
mas and hematologic malignancies. The mechanisms of pathogenesis are c
omplex inducing an unbalanced function of the antithrombotic system. A
ccording to the type of tumor and the underlying mechanism, clinical m
anifestations are generally severe. The diagnosis of these thromboses
are essentially clinical or radiological. The treatment is based on he
parinotherapy, thrombolytic agents or eventually on surgery, which is
not discussed here.