Favourable outcome of multisystem venous thrombosis associated with novel SERPINC1 mutation after treated with dabigatran: a case report with 7-year follow-up

Background: Mutations in SERPINC1 lead to deficiency in antithrombin (AT) which is an endogenous anticoagulant of normal hemostasis and could result in venous thromboembolism (VTE). Case presentation: A 61-year-old male patient with recurrent thrombosis returned to the hospital with multiple cerebral thrombosis after voluntary cessation of dabigatran therapy. Laboratory tests revealed a type I AT deficiency in this patient and further whole exome sequencing (WES) identified a novel heterozygous frameshift duplication (c.233_236dup, p.Val80Alafs*26) in SERPINC1 gene. Long-term dabigatran treatment was given and no recurrence or side effects were found within the followed 5 years. Conclusion: A multisystem VTE patient with a novel SERPINC1 mutation (c.233_236dup, p.Val80Alafs*26) reached a favourable outcome after dabigatran treatment.