HP and acute kidney injury: Upon admission he presented KDIGO stage 3 AKI (serum creatinine: 404 μmol/L, BUN: 43 mmol/L) with microscopic hematuria and glomerular range proteinuria (2 g/24 h) and signs of hematological TMA (Platelets 71,000 /mm3, hemoglobin level: 10 g/dL, haptoglobin < 0.08 g/L, LDH 864 U/L, detection of schistocytes 1.7%, reticulocytes 12,000/mm3).