Among them, 5 have Fanconi anaemia (71.4% of all bone marrow failure) [41, 54, 59, 74, 116], 1 has SAMD9 deficiency (14.3%) [101], and 1 has DKCA1 deficiency (14.3%) [19]. The gene discussed is SAMD9; the disease is hyperinsulinemic hypoglycemia, familial, 4.