MONDO_0013166 (GABA aminotransaminase deficiency) can be described as follows. Gamma-aminobutyric acid transaminase (GABA-T) deficiency is an extremely rare disorder of GABA metabolism characterized by a severe neonatal-infantile epileptic encephalopathy (manifesting with symptoms such as seizures, hypotonia, hyperreflexia and developmental delay) and growth acceleration. Also known as: GABA aminotransferase deficiency, GABA transaminase deficiency, gamma-amino butyric acid transaminase deficiency, gamma-aminobutyric acid transaminase deficiency.