Rare neurological diseases diagnosable by simple means.

Cholesterol, HDL, LDL, triglycerides: Tangier disease. Abetalipoproteinemia. Smith-Lemli-Opitz, Cerebrotendinous Xanthomatosis and other disorders of cholesterol synthesis. Alpha-fetoprotein: Ataxia-telangiectasia, Ataxia with oculomotor apraxia type 1 and type 2. Uric acid: Lesch-Nyhan. MCV: X-linked alpha-thalassemia mental retardation syndrome. Ferritin. Neuroferritinopathies. TSH, FT4, FT3. Allan-Herndon-Dudley. Benign hereditary chorea. Peripheral blood smear: Acanthocytes: Neuroacanthocytosis. …