TO THE EDITORS:Patients with severe cirrhosis with portal hypertension may develop a splenorenal shunt (SRS) spontaneously to divert portal flow. After transplantation, the SRS may be occluded spontaneously. However, a large SRS may persist. This persistent SRS can steal portal flow and cause portal vein thrombus, hepatic encephalopathy, and graft dysfunction.1 The methods to manage a large SRS in deceased donor liver transplantation include splenectomy, ligation of the SRS, ligation of the left renal vein, and percutaneous transfemoral embolization. 2,3 In living donor liver transplantation, management of a large SRS becomes more complicated because closure of an SRS to increase portal flow may increase portal pressure and shear stress and result in small-for-size syndrome (SFSS). 4 Therefore, the management of a large SRS during living donor liver transplantation has become a dilemma. Here we introduce ligation of the proximal splenic vein (SV) to resolve this dilemma. This study was approved by local ethic committee of ChangGung Memorial Hospital (IBR No. 101-2410B).A 51-year-old male patient had hepatitis C-related cirrhosis and hepatocellular carcinoma. Liver transplantation was performed because of tumor recurrence after radiofrequency ablation and transarterial chemoembolization. His body height was 168 cm, and his body weight was 81 kg. The liver cirrhosis status was Child-Pugh B, and the Model for End-Stage Liver Disease score was 13. Pretransplant computed tomography (CT) showed the diameter of the portal vein to be very small, and the portal flow was shunted into the renal vein via a large spontaneous SRS (Fig. 1). The living donor was the patient's 45-year-old sister, whose body height was 162 cm and whose body weight was 56.4 kg. The liver volume calculated by CT volumetry was 1272.9 cm 3 . The right lobe of the liver was 51.8% as calculated by Lee's formula with the diameters of right and left portal veins, 5 and the estimated graft weight was 659 g. During the donor operation, the right lobe of the liver without the middle hepatic vein was procured and weighed 650 g. The graft-to-recipient weight ratio was 0.80%. During the recipient's operation, we found that the caliber of the portal vein was small, and the portal flow was 200 mL/minute as measured by a flowmeter (Transonic Systems, Ithaca, NY). Therefore, the infrapancreas superior mesenteric vein (SMV) was identified and exposed. The tunnel between the pancreatic neck and the SMV was made. The junction between the SMV and SV was hooked upward and snared with a 1-0 silk thread (Fig. 2). Subsequently, the native liver was removed, and the liver graft was implanted. The portal vein was reconstructed via the grafting of the recipient's native portal vein to the graft portal vein. The portal flow was 500 mL/minute as measured by the flowmeter immediately the graft was reperfused. When the proximal SV was ligated, the portal flow was increased to 800 mL/minute. The hepatic artery was reconstructed by a microscopic technique, and the flow was 220 mL/...