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Registry of cancer patients with thromboembolism

Observational Epidemiological Study of Cancer-associated Thrombosis: Registry of Thrombosis & NEoplasia of SEOM (TESEO Study)

Observational Fundación Sociedad Española de Oncologia Médica · NCT03855592

This study is looking to gather information on adults with cancer who have had blood clots to better understand how cancer and blood clots are connected.

Quick facts

Study typeObservational
Enrollment700 (estimated)
Ages18 Years and up
SexAll
SponsorFundación Sociedad Española de Oncologia Médica Academic / other
Locations48 sites (Alcoy, Alicante and 47 other locations)
Trial IDNCT03855592 on ClinicalTrials.gov

What this trial studies

This observational study aims to collect data on patients diagnosed with cancer who experience venous or arterial thromboembolic events either prior to or following their cancer diagnosis. It is a multicentric study that will document these occurrences to better understand the relationship between cancer and thromboembolism. Patients over 18 years old with a confirmed malignant tumor and a documented thromboembolic episode will be included. The study will utilize imaging techniques for confirmation of thromboembolic events.

Who should consider this trial

Good fit: Ideal candidates are adults over 18 with a confirmed diagnosis of cancer who have experienced a thromboembolic event.

Not a fit: Patients without a confirmed thromboembolic event or those with superficial thrombophlebitis alone will not benefit from this study.

Why it matters

Potential benefit: If successful, this study could enhance understanding of thromboembolism in cancer patients, potentially leading to improved management and treatment strategies.

How similar studies have performed: While this study is observational and builds on existing knowledge, similar studies have shown the importance of understanding thromboembolic events in cancer patients, indicating potential for valuable insights.

Eligibility criteria

Show full inclusion / exclusion criteria 
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 month prior or any time after the cancer diagnosis and in the three previous months to enrollment, confirmed with an imaging technique: Doppler echocardiography, computed tomography (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 with another thromboembolic event.
* Each patient will be recorded just once, and therefore a second thromboembolic event will be considered a rethrombosis and will be recorded as such. Patients with a rethrombosis and a previous thromboembolic event before the start of the study in each center will not be able to be included.

Where this trial is running

Alcoy, Alicante and 47 other locations

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
View on ClinicalTrials.gov → Find more trials like this →
Conditions ThromboembolismCancer
Last reviewed 2026-06-10 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.