An Unusual Case of Relapsing and Remitting Acute Kidney Injury.

Paroxysmal nocturnal haemoglobinuria (PNH), although a rare type of acquired hemolytic anemia, can be life-threatening if not diagnosed early. Kidney involvement in PNH varies from reversible acute kidney injury to irreversible chronic damage. Here, we report a case of recurrent acute kidney injury in a young male requiring renal replacement support. Repeated history of AKI with coombs negative hemolytic anemia led us to perform PNH profile after ruling out other causes. Although kidney involvement in PNH is not apparent, this case shows the importance of having a high index of suspicion which will help in preventing further episodes of AKI and thus, chronic kidney disease burden.