Saccharopinuria

A rare autosomal recessive disorder of the lysine catabolism characterized by elevated levels of lysine in the cerebrospinal fluid and blood with variable degrees of saccharopinuria. Some patients present with neurological symptoms such as seizures, spastic diplegia, mild psychomotor delay, intellectual deficit, and behavioral difficulties. However, current findings suggest no causal association between isolated hyperlysinemia and neurological symptoms.