Fructose-1,6-bisphosphatase deficiency caused by a novel homozygous Alu element insertion in the FBP1 gene and delayed diagnosis.

Fructose-1,6-bisphosphatase (FBPase) enzyme deficiency is one of the treatable autosomal recessive inherited metabolic disorders. If diagnosed early, FBPase deficiency has a favorable prognosis. We report the clinical and biochemical findings of a 9.5-year-old female child with FBPase deficiency. FBPase deficiency is caused by a homozygous Arthrobacter luteus (Alu) insertion in the FBP1 gene, reported for the first time.