Huntington Disease-Like 3, also known as hdl3, is related to huntington's disease-like syndrome and huntington disease-like 2, and has symptoms including ataxia, muscle spasticity and seizures. An important gene associated with Huntington Disease-Like 3 is HDL3 (Huntington-Like Neurodegenerative Disorder 2). Affiliated tissues include brain and smooth muscle, and related phenotypes are seizure and spasticity