The 18th World Congress of Dermatology Ichiro Kikuchi (National Leprosarium Kikuchi Keifu-En) The 18th World Congress of Dermatology was held in New York in June 1992, during which a symposium on leprosy was chaired by Dr. Bhutani of India. He characterized the spectrum of leprosy and stated that leprosy patients in the world numbered 20 to 15 million, as against the 5, 500, 000 by a WHO report. Azulay of Brazil proposed a concept of the third type of leprosy reaction with autoimmune antibodies following type 1 and type 2 reactions of Jopling. This has aroused a considerable discussion