Hypercholesterolemia, Familial, 4, also known as hypercholesterolemia, autosomal recessive, is related to hypercholesterolemia, familial, 1 and hypolipoproteinemia. An important gene associated with Hypercholesterolemia, Familial, 4 is LDLRAP1 (Low Density Lipoprotein Receptor Adaptor Protein 1), and among its related pathways/superpathways are Transport of inorganic cations/anions and amino acids/oligopeptides and Vesicle-mediated transport. The drugs Atorvastatin and Alirocumab have been mentioned in the context of this disorder. Affiliated tissues include heart and breast, and related phenotypes are hypertriglyceridemia and hypercholesterolemia