4 female patients, median age 47 (R35-55), with PMF INT-2 and with SVT (2 portal, 2 mesenteric + splenic + portal), median Hb11.5g/dl (R11-12.5), PLT90000/mcl (R70000-100000), WBC10000/mcl (R4000-11000), peripheral blood blasts 1% (R1-2), 1 patient heterozygous for factor V Leiden received ruxolitinib 20mg/day +warfarin. All patients were Jak-2 mutated(GROUP1)...Patients of GROUP1 showed a complete resolution of SVT in 2 cases and a partial portal recanalization in 2 cases after 3 months, without any thrombosis relapse or progression after 6 months...Ruxolitinib and VKA is safe and effective and shows a faster recanalization and an antinflammatory effect in patients with PMF with SVT.