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A very rare and severe congenital multisystem disorder with the principal features of agenesis of the corpus callosum, cataracts, oculocutaneous hypopigmentation, cardiomyopathy and combined immunodeficiency. Usually diagnosed in the first years of life. The phenotype is variable but the principal diagnostic features are almost always present at onset or evolve over time. Caused by mutations in the EPG5 gene (18q12.3) which encodes an important autophagy regulator, ectopic P-granules autophagy protein 5 (epg5). Formation of autolysosomes is specifically disturbed by an epg5 deficiency.
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