“…The re-trafficking of iron is also found in many categories of chronically ill patients with anemia of chronic disease or anemia of inflammation, where the retention of iron in reticuloendothelial cells causes iron-restricted erythropoiesis, low production of hemoglobin, and also anemia. These diseases include cancer and hematological malignancies, infections, inflammatory diseases, immune-mediated diseases, chronic kidney disease, and congestive heart failure ( Table 1 ) [ 145 , 146 , 147 , 148 , 149 , 150 , 151 , 152 , 153 ]. The treatment of the anemia of chronic disease is very challenging for almost all categories of patients affected and is the subject of research investigations and therapeutic approaches, including, in many cases, the fine balance between iron deficiency level and iron toxicity of administered iron [ 154 , 155 , 156 , 157 , 158 , 159 , 160 , 161 ].…”