Mysm1‐deficient mice exhibited growth retardation, skeletal deficits, and complex hematopoietic and immune dysfunctions.[14, 15, 16] Patients with Mysm1 mutations demonstrated anemia and leukopenia and, in some cases, mutations were associated with growth retardation.[17] Bahrami et al. The gene discussed is MYSM1; the disease is anemia.