Leukoencephalopathy with dystonia and motor neuropathy is a disorder caused by a deficiency of sterol carrier protein-2 (SCPx), a peroxisomal enzyme with thiolase activity, which is required for the breakdown of branched-chain fatty acids. The patient presents with torticollis and dystonic head tremor as well as slight cerebellar signs with intention tremor, nystagmus, hyposmia, and azoospermia.
