A rare syndrome where a genetic mutation results in a metabolic disorders caused by a deficiency of sterol 27-hydroxylase deficiency. The condition causes progressive neurological dysfunction, cataracts and premature atherosclerosis. Deposits of cholesterol and cholestanol can be found in any part of the body including the brain. The rate of progression and severity of symptoms varying amongst patients. The degree of neurological involvement is also variable. See also Cerebrotendinous Xanthomatosus