NCIt definition : A rare metabolic disorder characterized by damage of the myelin sheaths in the nervous
system and degeneration of the adrenal glands. It leads to progressive neurologic
disorders, adrenal insufficiency and death.;
Alternative definition : NICHD: An X-linked recessive condition caused by mutation(s) in the ABCD1 gene, resulting
in defective peroxisomal fatty acid oxidation and accumulation of saturated very long
chain fatty acids in all tissues of the body. Clinical manifestations of the condition
vary in severity, and can include progressive loss of adrenal gland function, Leydig
cell dysfunction, and neurodegenerative changes.;