GPT and pancreatic serous cystadenoma: In pediatric and adult PSC patients, the oral administration of antibiotics was reported to decrease the serum levels of alanine aminotransferase (ALT) and γ-glutamyltranspeptidase (GGT), with histological improvement10–14, implying that gastrointestinal inflammation and indigenous microbes are associated with the pathogenesis and prognosis of PSC, and that early intervention may also produce better prognoses.