HP and acute kidney injury: All patients exhibited an acute renal failure (median plasma creatinine level: 3.4 mg/dl [2.4-5.5]) and mechanical, non immune haemolytic anaemia (median Hb: 7.6 g/dl [7.1-8.9], median LDH: 1012 UI/L [607–202], and haptoglobin was not measurable).