Alagille syndrome 1 (ALGS1) [MIM:118450]: A form of Alagille syndrome, an autosomal dominant multisystem disorder. It is clinically defined by hepatic bile duct paucity and cholestasis in association with cardiac, skeletal, and ophthalmologic manifestations. There are characteristic facial features and less frequent clinical involvement of the renal and vascular systems. {ECO:0000269|PubMed:10220506, ECO:0000269|PubMed:10533065, ECO:0000269|PubMed:11058898, ECO:0000269|PubMed:11139247, ECO:0000269|PubMed:11157803, ECO:0000269|PubMed:11180599, ECO:0000269|PubMed:12442286, ECO:0000269|PubMed:12497640, ECO:0000269|PubMed:15712272, ECO:0000269|PubMed:16575836, ECO:0000269|PubMed:20437614, ECO:0000269|PubMed:23801938, ECO:0000269|PubMed:9207788, ECO:0000269|PubMed:9585603}. Note=The disease is caused by mutations affecting the gene represented in this entry.; Tetralogy of Fallot (TOF) [MIM:187500]: A congenital heart anomaly which consists of pulmonary stenosis, ventricular septal defect, dextroposition of the aorta (aorta is on the right side instead of the left) and hypertrophy of the right ventricle. In this condition, blood from both ventricles (oxygen-rich and oxygen-poor) is pumped into the body often causing cyanosis. {ECO:0000269|PubMed:11152664, ECO:0000269|PubMed:20437614}. Note=The disease is caused by mutations affecting the gene represented in this entry.; Deafness, congenital heart defects, and posterior embryotoxon (DCHE) [MIM:617992]: An autosomal dominant disease characterized by mild to severe combined hearing loss, congenital heart defects, and posterior embryotoxon, a corneal abnormality consisting of a central collagen core surrounded by a thin layer of Descemets membrane and separated from the anterior chamber by a layer of endothelium. Congenital heart defects include tetralogy of Fallot, ventricular septal defect, or isolated peripheral pulmonic stenosis. {ECO:0000269|PubMed:12022040, ECO:0000269|PubMed:20437614}. Note=The disease is caused by mutations affecting the gene represented in this entry.