<prompt> Lack of alpha-oxidation of fatty acids leads toAccumulation of phytanic acidFormation of dicarboxylic acidFormation of propionic acidOxidation of branched chain fatty acid  <response>: Refsum;s Disease It is a metabolic error due to lack of alpha-hydroxylase phytanic acid oxidase so that alpha-oxidation does not occur and phytanic acid accumulates in the tissues. The patient presents with severe neurological symptoms, polyneuropathy, retinitis pigmentosa, nerve deafness and cerebellar ataxia. Regressions of symptoms are observed with restricted dietary intake of phytanic acid. Milk is a good source of phytanic acid, which may be avoided.Ref: DM Vasudevan - Textbook of Biochemistry, 6th edition, page no: 135 