68977965_Xanthomas__DermNet_NZ__Cause
[Fredrickson classifcation] Monogenic familial hypercholesterolaemia: Type IIa [Biochemical findings] High levels of LDL Total cholesterol in heterozygotes 9-14 mmol/L Total cholesterol in homozygotes 15-30 mmol/L [Cause] 
Mutation in LDL receptor
Xanthomas. DermNet NZ
Cause