Outcome analysis in adult-to-adult living donor liver transplantation using the left lobe

Abstract

Graft size problems remain the greatest limiting factor for expansion of living donor liver transplantation (LDLT) to the adult population. The result of adult‐to‐adult LDLT using the left lobe with special reference to graft size has not been fully evaluated to date. In this study, we evaluated the outcome of adult‐to‐adult LDLT using the left lobe and also analyze the impact of using small‐for‐size grafts on outcome. Thirty‐six recipients who underwent adult‐to‐adult LDLT using the left lobe (n = 14) or left lobe plus caudate lobe (n = 22) were included in the study. Variables including preoperative and operative data, patient and graft survival, complications, and causes of graft loss were studied. Furthermore, the incidence of small‐for‐size syndrome and its impact on graft survival were studied. Mean graft volume (GV) was 420 ± 85 g (range, 260 to 620 g), which resulted in 38.2% ± 8.1% (range, 22.8% to 53.8%) of the recipient standard liver volume (SLV). Overall 1‐year patient and graft survival rates were 85.7% and 82.9%, respectively. Seven grafts were lost. Small‐for‐size syndrome occurred in 7 of 16 patients (43.8%) with cirrhosis and only 1 of 20 patients (5.0%) without cirrhosis (P = .005). Recipients who developed small‐for‐size syndrome had inferior graft survival to those who did not (P = .07). In conclusion, adult‐to‐adult LDLTs were found to be feasible without affecting patient or graft survival. Small‐for‐size syndrome developed more frequently in patients with cirrhosis. Minimum GV in adult‐to‐adult LDLT should be 30% less than the recipient's SLV in patients without cirrhosis, whereas 45% less was required in patients with cirrhosis.