Laboratory findings Biochemistry study: 1.SI\<8.95 u mol/L(500ug/L), TIBC 1>64.44 u mol/L(3600H g/L), Transferrin saturation \< 15% 2. Ferritin <12ug/L, high sensitivity and specificity 3. Free protoporphyrin TLaboratory findings Biochemistry study: 1.SI↓<8.95μmol/L(500μg/L) , TIBC ↑> 64.44 μmol/L (3600μg/L), Transferrin saturation ↓< 15%, 2. Ferritin↓ <12g/L，high sensitivity and specificity 3. Free protoporphyrin↑