Thiamine Metabolism Dysfunction Syndrome 5, also known as thmd5, is related to childhood encephalopathy due to thiamine pyrophosphokinase deficiency and amed syndrome, digenic, and has symptoms including ataxia and muscle spasticity. An important gene associated with Thiamine Metabolism Dysfunction Syndrome 5 is TPK1 (Thiamin Pyrophosphokinase 1). Affiliated tissues include caudate nucleus and brain, and related phenotypes are increased urine alpha-ketoglutarate concentration and dystonia