JAK2 mutation in liver recipients.- JAK2 V617F was only detected in four of the 271 primary OLT recipients included in this study, details as follows: one patient diagnosed previously with PV, who presented Budd-Chiari syndrome (BCS); an other diagnosed with Budd-Chiari with features of NMP; and two others with neither thrombotic complications nor NMP features (Table 2). The gene discussed is JAK2; the disease is acquired polycythemia vera.