SERPINE1 and myeloproliferative neoplasm: Analyzing specifically the 10 patients with PVT and BCS, MPN was present in 7 and chronic disease in 3; 9/10 showed at least one THRGF: 6 patients PAI-1 4G-4G, 2 patients MTHFR677TT, and 2 patients V Leiden 506Q; one patient showed the presence of more than one THRGF.