[Phenotype change in hyperlipoproteinemias]

The spontaneous and the induced change of phenotype makes the correct interpretation of disturbance of fat metabolism on the base of phenotypization by Fredrickson more difficult. This is underlined by the present international practice to divide disturbances of fat metabolism for the time by increased lipids into hypercholesterinaemiae, hypertriglyceridaemiae and hypertriglyceride-hypercholesterinaemiae. The common trend, however, aims at characterization of disturbances of fat metabolism by changes of apoproteins.