Disease_Mapped_To_Gene Hyperlipoproteinemia, Type IIa An autosomal dominant inherited disorder characterized by very high levels of low-density lipoprotein cholesterol (LDL-C) and total cholesterol in the blood. It is usually caused by mutations in the LDLR gene which is located on the short arm of chromosome 19. Hyperlipoproteinemia, Type IIa Hyperlipidemia Type IIa Hyperlipoproteinemia, Type IIa FH C2931909 Familial Hypercholesterolemia C123416 Type IIa Hyperlipidemia Disease or Syndrome Cellosaurus Cellosaurus Disease Terminology LDLR Gene Hyperlipoproteinemia, Type II