Formiminoglutamic aciduria (OMIM #229100) is associated with an autosomal recessive condition affecting folate and histidine metabolism and often caused by formiminotransferase‐cyclodeaminase (FTCD, EC 2.1.2.5 to EC 4.3.1.4) deficiency, which is encoded by FTCD (HGNC: 3974; OMIM: 606806) (Watkins and Rosenblatt 2014). This evidence concerns the gene FTCD and formiminoglutamic aciduria.