The peroxisomal disorders represent a group of inherited diseases in m
an in which there is an impairment in one or more peroxisomal function
s. The disorders known up to now are usually subdivided into three gro
ups depending upon whether there is a more generalized, multiple or si
ngle loss of peroxisomal functions. In this paper we will briefly desc
ribe the peroxisomal disorders known thus far with the biochemical abn
ormalities identified. Furthermore, we will describe a straightforward
approach for the postnatal identification of patients suspected to su
ffer from a peroxisomal disorder which is of great importance since re
liable prenatal diagnostic methods have become available for each of t
hese disorders.