Polycystic Kidney Disease 4 with or Without Polycystic Liver Disease, also known as autosomal recessive polycystic kidney disease, is related to polycystic kidney disease and polycystic kidney disease 4. An important gene associated with Polycystic Kidney Disease 4 with or Without Polycystic Liver Disease is PKHD1 (PKHD1 Ciliary IPT Domain Containing Fibrocystin/Polyductin), and among its related pathways/superpathways are Organelle biogenesis and maintenance and Cargo trafficking to the periciliary membrane. The drugs Tolvaptan and Vasopressins have been mentioned in the context of this disorder. Affiliated tissues include kidney and liver, and related phenotypes are hypertension and hepatic fibrosis