Higher dose of rivaroxaban for the treatment of venous thromboembolism in a 15-year-old Asian child with antithrombin deficiency: A case report and literature review.

Rationale: Deficiency in antithrombin (AT) can significantly increase the risk of venous thromboembolism (VTE). However, there is insufficient data on the efficacy and safety of anticoagulants in patients with AT deficiency, especially in children. In addition, Asian populations typically require a lower dose of rivaroxaban, and this may be even more pronounced in Asian children.