Superficial vein thrombosis and its relationship with malignancies: a prospective observational study.

Background: The interrelation of cancer with venous thromboembolism is established, yet the specific impact on the incidence and progression of superficial vein thrombosis (SVT) remains unclear. Objectives: To investigate the association between SVT and malignancies, focusing on risk factors, presentation, course and complications. Methods: A single-center prospective observational study of patients diagnosed with DVT or SVT referred to a venous thromboembolism clinic between January 2013 and April 2018. Results: Of the 632 patients, 205 presented with SVT at referral, 16.6% having active cancer. Significant associations were found between active cancer and the risk of developing proximal SVT (RR 1.54 [1.18–2.03] p < 0.01), SVT within 3 cm from junction (RR 2.01 [1.13–3.72] p = 0.019), bilateral SVT (RR 8.38 [2.10-33.43] p < 0.01) and SVT affecting multiple veins (RR 2.42 [1.40–4.20] p < 0.01), with a higher risk of persistence (RR 1.51 [1.18–1.95] p < 0.01) and progression (RR 5.75 [2.23–14.79] p < 0.01) at initial assessment. Patients with SVT and no malignancy history demonstrated an elevated risk for new-onset cancer during follow-up (RR 1.43 [1.13–1.18] p = 0.022), especially in cases of proximal or bilateral SVT, initial progression or subsequent DVT or PE. No significant differences were observed in persistence, recurrence or complications during initial evaluation or follow-up across different pharmacological treatments. Conclusions: Research suggests a probable link between cancer history and the development of SVT. SVT presented more severely in cancer patients. SVT, especially in its more complex forms, could serve as a predictive marker for the future development of cancer. Treatment approaches varied, no significant differences in outcomes were noted. [ABSTRACT FROM AUTHOR]