EditorialTop 10 reasons why you must learn onco-nephrologyWe have used many chemotherapeutic agents with renal toxicity (1), such as, of course, the notorious cisplatin. As a trainee in oncology more than a quarter of a century ago, management of nephrotoxicity was one of the most important tasks for me, probably next to that of myelosuppression. So was it then, and still it is now. Why, therefore, is onco-nephrology emerging as a new entity now (2-4), and should we bother to learn it all over again? I will give you the reasons.Reason #1. There are a number of chemotherapy-associated kidney diseases I have already made mention of this. While it should be a good reason for an oncologist to learn nephrology, this is no new thing.