A novel genetic variant associated with progressive familial intrahepatic cholestasis type 3: A case series.

Progressive familial intrahepatic cholestasis type 3 (PFIC-3) is a rare disorder characterized by chronic cholestasis usually progressing to end-stage liver disease (ESLD) within the first two decades of life. PFIC-3 is caused by pathogenic genetic variants of the ATP-binding cassette 4 (ABCB4) gene with variable inheritance; the most common is autosomal recessive. We present two cases of PFIC-3 with genetic testing confirming a novel genetic variant in ABCB4 with homozygous genotype c.779 T > C, p.L260P. Both individuals are from mainland Southeast Asia and have a clinical picture consistent with cholestasis progressing to ESLD.