Observational StudyNon-invasive Diagnosis of Non-alcoholic Steatohepatitis in Liver Transplant Recipients

The purpose of this study is is to use non-invasive diagnostic tests, Fibroscan and a simple blood test, to diagnose NASH in patients who undergo liver transplantation. Liver transplantation is a life-saving procedure for people with cirrhosis. Fatty liver is a common reason for liver transplantation due to obesity and diabetes. Fatty liver can happen again to the new transplanted liver and it is often due to metabolic risk factors (including diabetes, rapid weight gain, and immunosuppressive therapy, which are used to avoid rejection of the new liver). Some patients with fatty liver after liver transplant have non-alcoholic steatohepatitis (NASH) injury to liver the tissue (inflammation) and damage which is caused by a build-up of fat in the liver. This is a serious problem and can lead to cirrhosis and loss of the transplanted liver. There has been no detailed study into the recurrence of NASH. One reason for this is one of the only ways to detect fatty liver and NASH is to have a liver biopsy, which can be painful and have complications. Recently, a new technology (Fibroscan) and a simple blood test (cytokeratin 18) have been developed which can tell doctors how much a liver is damaged and how much fat it contains without pain or complications. This is a year long study involving one screening visit and 3 study visits, 3 months apart.