AIHA, autoimmune hemolytic anemia; ANA, antinuclear antibody; CECT, contrast-enhanced computed tomography; dsDNA, double-stranded deoxyribonucleic acid; EPO, erythropoietin; FC, flow cytometry; FISH, fluorescence in situ hybridization; Hb, hemoglobin; M/E, myeloid-to-erythroid ratio; PBS, peripheral blood smear; Retic, reticulocyte; RBCs, red blood cells; SLE, systemic lupus erythematosus; MDS, myelodysplastic syndrome; WBC, white blood count; M, male; F, female. The gene discussed is EPO; the disease is autoimmune hemolytic anemia.