Anemia, Sideroblastic, 4, also known as sidba4, is related to autosomal dominant sideroblastic anemia 4. An important gene associated with Anemia, Sideroblastic, 4 is HSPA9 (Heat Shock Protein Family A (Hsp70) Member 9). Affiliated tissues include bone marrow and bone, and related phenotypes are refractory anemia with ringed sideroblasts and abnormal erythrocyte morphology