Hypoalphalipoproteinemia is a common finding in patients with premature coronary artery disease. Familial hypoalphalipoproteinemia syndromes are phenotypically heterogeneous. One form is associated with abnormal cellular cholesterol efflux caused by heterozygous mutations at the ABCA1 gene. Other forms are primary hypoalphalipoproteinemia caused by mutations of APOA1 gene.
