In this episode, Dr. Silva discusses the origins and controversies surrounding ANCA-mediated vasculitis.

Note: Dr. Charles Jennette relays that at the ASN meeting in which Fokko Van Der Woude described his discovery of anti-neutrophil antibodies in Wegener's granulomatosis, Dr. Jennette was headed for the same microphone to point out that David Davies had already published this, but David got there first.