HP and acute kidney injury: One month later the patient was readmitted in our unit owing to the recurrence of peripheral thrombotic microangiopathy (platelets: 130000/mm3, Hemoglobin: haptoglobin < 0.01 g/dl, schistocytes: 1%, LDH: 740 UI/L) and AKI with a creatinine level of 470 μmol/L.