UC Irvine

BACKGROUND: Thrombotic microangiopathy (TMA) is a rare, life-threatening disorder characterized by microangiopathic hemolytic anemia, thrombocytopenia, and end-organ damage. Atypical hemolytic uremic syndrome (aHUS) is even less common, comprising less than 10% of hemolytic uremic syndrome (HUS) cases. aHUS in postpartum is associated with poor maternal outcomes, with the majority of cases resulting in end-stage renal disease. aHUS, unlike other types of TMA, is related to complement dysregulation. Thus, the current treatment of choice for aHUS is complement blockade, which limits unregulated activation of complement and complement-mediated end organ damage. CASE PRESENTATION: We present a rare case of a previously healthy, postpartum, 20-year-old Hispanic female patient who underwent a laparoscopic cholecystectomy and subsequently developed complement-mediated TMA, successfully treated with eculizumab. Unique to our case was renal failure owing to multiple insults and partial resolution of hematologic TMA findings prior to initiation of eculizumab. CONCLUSION: Our case emphasizes the importance of clinicians possessing a high degree of clinical awareness and judgement surrounding complement-mediated TMA, aHUS and its subsets, and surgery as a precipitator, regardless of safety, particularly during the postpartum period.