ALB and hemorrhagic cystitis: Although TA-TMA was associated with a higher incidence of hemorrhagic cystitis and urinary occult blood and a reduction in platelet and ALB levels, these indicators were similarly observed in our grade III-IV aGVHD patients, therefore, hemorrhagic cystitis, urinary occult blood, platelets counts, and ALB levels are more significant only when differentiating between TA-TMA and grade I-II aGVHD cases.