Typical or atypical hemolytic uremic syndrome? That is the question

The authors investigate the diagnostic challenges in distinguishing between typical hemolytic uremic syndrome (HUS) associated with Shiga toxin-producing Escherichia coli (STEC-HUS) and atypical HUS (aHUS) in a pediatric patient. They present a case of an 11-month-old boy whose unexpected drop in platelet count during recovery raised suspicion for aHUS, leading to treatment with eculizumab. The study emphasizes the importance of monitoring platelet counts against disease-specific trajectories to identify deviations from expected STEC-HUS progression and enable timely intervention.