succinic semialdehyde dehydrogenase deficiency
Succinic semialdehyde dehydrogenase (SSADH) deficiency is a rare neurometabolic disorder of gamma-aminobutyric acid (GABA) metabolism with a nonspecific clinical presentation (ranging from mild to severe) with the most frequent symptoms being cognitive impairment with prominent deficit in expressive language, hypotonia, ataxia, epilepsy, and behavioral dysregulation.