Better late than never: Diagnosis of recurrent atypical hemolytic uremic syndrome.

Atypical hemolytic uremic syndrome (aHUS) is a rare form of thrombotic microangiopathy (TMA) comprising microangiopathic hemolytic anemia, consumptive thrombocytopenia, and end-organ damage. Risk of end-stage renal disease is increased as HUS usually manifests in native and transplanted kidneys. In transplants, while de novo disease can be seen, recurrent disease is more common. The etiology is variable, being either primary or secondary. aHUS often constitutes a diagnostic and therapeutic challenge, which may lead to a considerable delay in the diagnosis and treatment. During the last decades, great progress has been made in understanding the mechanisms and therapeutic options of this devastating condition. We present a case of a 50-year-old female who received her first kidney transplant from her mother at the age of 9 years. She experienced recurrent losses of transplants, and only after the loss of her fourth transplant did the diagnosis of aHUS become evident.