(2) Médecine Vasculaire, Vienne, France.
(3 patients or severe infection. We described a femoral arterial thrombosis in a young 75 patient with negative etiological assessment except non-severe COVID-19. 76
Treatment consists in anticoagulation and antiaggregant drugs and thrombectomy. 77
Preventing venous thromboembolism treatment is recommended in case of severe 78 infection or in ICU but there is no clear recommendation for arterial thromboembolism 79
prevention. This case should lead us to be very careful to arterial event risk even if 80 the infection is non-severe and the patient young. 1.1%, in Milan Hospital, with higher rate in intensive care unit (ICU) (9) . 156
Thromboembolic risk seems to be higher in severe infections, because of major 157 inflammation and need of ICU (5) . Thus, in Klok et al study, cumulative incidence of a 158 composite outcome of vascular events (acute pulmonary embolism, deep-vein 159 thrombosis, ischemic stroke, myocardial infarction, systemic arterial embolism) was 31%, incidence of venous thromboembolisms was 27% while 3.7% were arterial 161 events, among patients in ICU(10). 162
Arterial complications take various forms. In children, COVID-19 is commonly 163 asymptomatic but Kawasaki-like syndrome are described(11). In adult, arterial 164 thromboembolism have been described. Acute coronary syndrome and myocardial 165 infarction have been reported in case of COVID-19 but seems to be 166 infrequent (5, 9, 12) The treatment of this femoral artery thrombosis was standard, using aspirin, LMWH 177 and thrombectomy. Using drugs to prevent thrombosis in COVID-19 context remains 178 debated. To prevent venous events, prophylactic anticoagulation in high risk 179 situations is essential (5) . Prevention of arterial complications is more difficult. Indeed, 180 some antiviral drugs such as ritonavir interact with certain antithrombotic treatments, 181 making their use complicated (5) . Moreover, determining which patient is high arterial 182 thromboembolism risk seems uneasy, since it could happen on non-pathological 183 arteries, in young patient with non-severe COVID-19, as we have reported here. 