Atypical hemolytic uremic syndrome is diagnosed through a combination of characteristic clinical presentations, laboratory markers of microangiopathic hemolytic anemia and thrombocytopenia, and specialized complement or genetic evaluations.
Multiple papers discuss the diagnostic criteria for atypical hemolytic uremic syndrome (aHUS), confirming that it is diagnosed using characteristic clinical presentations (such as organ injury and hypertension) and laboratory findings (such as microangiopathic hemolytic anemia, thrombocytopenia, elevated LDH, and complement abnormalities). No papers refute this claim.