From Citizendium, the Citizens' Compendium
Dyslipidemia is defined as "abnormalities in the serum levels of lipids, including overproduction or deficiency. Abnormal serum lipid profiles may include high total cholesterol, high triglycerides, low high density lipoprotein cholesterol, and elevated low density lipoprotein cholesterol."
Hypolipoproteinemias are defined as "conditions with abnormally low levels of lipoproteins in the blood. This may involve any of the lipoprotein subclasses, including alpha-lipoproteins (high-density lipoproteins); beta-lipoproteins (low-density lipoproteins); and prebeta-lipoproteins (very-low-density lipoproteins)." Hypolipoproteinemias include hypoalphalipoproteinemia (HDL Lipoprotein Deficiency Disease).