The paper presents the case of clinical observation of a patient with atypical hemolytic-uremic syndrome (aHUS). aHUS is a disease characterized by an unfavorable prognosis (severe or catastrophic course with rapid development of terminal renal or multi-organ failure). The aim of the study is to evaluate the approaches to differential diagnosis of aHUS in clinical practice. https://www.roneverhart.com/Dynarex-WeCare-Vitamin-A-D-Ointment-Skin-Protectant/