Registry of Thrombosis & NEoplasia of "Sociedad Española de Oncología Médica"

Inclusion Criteria:

• Over 18 years of age with a histologically confirmed diagnosis of malignant tumor.

• Venous or arterial thromboembolism episode, symptomatic or incidental, in the monthprior or any time after the cancer diagnosis and in the three previous months toenrollment, confirmed with an imaging technique: Doppler echocardiography, computedtomography (CT) angiography, etc.

• Signing of informed consent.

Exclusion Criteria:

• Clinical diagnosis of thromboembolic event without radiological confirmation.

• Presenting a single episode of superficial thrombophlebitis without association withanother thromboembolic event.

• Each patient will be recorded just once, and therefore a second thromboembolic eventwill be considered a rethrombosis and will be recorded as such. Patients with arethrombosis and a previous thromboembolic event before the start of the study ineach center will not be able to be included.