Efficacy of new low-dose oral anticoagulants in recalcitrant livedoid vasculopathy

Livedoid vasculopathy (LV) is a thrombotic skin disease characterised by recurrent painful ulcerations and irreversible scar formation on the lower legs, which is caused by occlusion of the cutaneous microcirculation. Edoxaban is one of new oral anticoagulants. It directly inhibits factor Xa in the coagulation pathway and prevents thrombus formation. A 17-year-old Japanese male presented with a 1-year history of recalcitrant cutaneous ulcers and livedo racemosa on his lower extremities. Initially, the ulcers were treated with antiplatelets therapies; however, he experienced recurrence of ulcerations during summer time. A histological examination revealed dermal vessel thrombosis consistent with occlusive vasculopathy. These findings were diagnostic for LV. The patient was treated with oral low-dose edoxaban (15 mg/day). The skin ulcers were epithelised and livedo racemosa disappeared within 8 weeks. We herein report the successful treatment of recalcitrant LV with low-dose edoxaban in a patient with no identifiable coagulopathy.