JAK2 and myeloproliferative disorder: In a cohort of 16 FA patients, this same mutation in SF3B1 was identified in a patient with a germline FANCA mutation, who developed refractory anemia with ring sideroblasts and mutations in SF3B1 and JAK2 seem to co‐occur in myelodysplastic/myeloproliferative neoplasms with ring sideroblasts and thrombocytosis [38, 39].