The incidence, risk factors, and prognosis of recurrent venous thromboembolism (VTE) in patients with advanced solid cancers receiving anticoagulation therapy after the diagnosis of index VTE

Patients with cancer have been associated with increased risk of recurrent venous thromboembolism (VTE). However, data on recurrent VTE in Asian patients with advanced solid cancers are limited. Methods This study was conducted using data from the Korean VTE registry, which is an ongoing, prospective database. Patients were eligible if they had diagnosed with recurrent/metastatic solid cancers and initiated anticoagulation therapy following index VTE diagnosis. A total of 449 patients were included in this analysis. The 6-month and 12-month cumulative incidences of recurrent VTE were 20.6% and 27.0%, respectively. Isolated pulmonary embolism (PE) (51%) was the most predominant recurrence type. Pancreas as the primary tumor site, poor Eastern Cooperative Oncology Group performance status at the time of index VTE diagnosis, and initial presentation with PE were independent risk factors for developing recurrent VTE. With a median follow-up of 29.1 months (range, 1.0-91.2), the median overall survival (OS) was 11.9 months. Patients with recurrent VTE had a significantly worse OS than those without recurrent VTE (median, 8.4 vs. 13.0 months, respectively; P = 0.001). In conclusion, the incidence of recurrent VTE in Korean patients with advanced solid cancers is comparable with Caucasian patients. Pancreas as the primary tumor site, poor performance status, and initial presentation with PE are independent recurrent VTE risk factors in advanced cancer VTE patients. Additionally, OS is adversely affected by recurrent VTE.