GGTLC1 and Hyperbilirubinemia: Hyperbilirubinemia (total bilirubin > 1.2 mg/dL) was evident in 30 patients (76.9%) and elevated levels of Alkaline Phosphatase and Gamma Glutamyl Transpeptidase (ALP > 230 IU/L, GGT > 48 IU/L) were found in all cases except one (97.4%) who was diagnosed incidentally during the upper gastrointestinal endoscopy.