The Burden of Atypical Hemolytic Uremic Syndrome and The Clinical Characteristics of Patients in Egyptian Hospitals A Multicenter, Observational, Retrospective Cohort Study in Egypt

Atypical hemolytic uremic syndrome (aHUS) is a rare, progressive, and life-threatening disease that occurs at any age, with incidence rate of 0.75 to 2.0 cases per million population per year. aHUS is a thrombotic microangiopathy (TMA) commonly caused by dysregulation of the complement system, affecting several organs, especially the kidneys. aHUS can be familial or sporadic, and approximately 50% to 60% of patients have specific identifiable genetic complement mutations and antibodies. Although aHUS is a rare disease, it has a significant impact on the quality of life because of its poor prognosis: a 25% global mortality rate; more than 50% of untreated patients advance to endstage renal disease (ESRD); and more than 75% of adults with renal failure require prompt dialysis. The risk of relapse is also high in many patients, either in the native or transplanted kidneys, so long-term management and close monitoring are essential. Advancements in aHUS therapies, especially the availability of anti-complement therapy, have enhanced the natural course of aHUS through hematologic remission induction, kidney function stabilization or improvement, and graft failure prevention. Since complement inhibitors are still unavailable in Egypt, it is important to understand the aHUS manifestations of pediatrics and adults in Egyptian hospitals, aiming for early diagnosis and proper management. In this study, we primarily aim to describe the aHUS burden on the patients by gathering their d…

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