Igor Moiseevich Kvetnoy (Russian: ????? ????????? ???????; born December 31, 1948 in Khabarovsk) is a Russian expert in the field of molecular medicine and neuroendocrinology.
He participated in the discovery of extrapineal melatonin production.
He contributed to the discovery and development of the doctrine of diffuse neuroendocrine immune system (DNIES) and considered a founder of the Russian scientific school of neuroimmunoendo?rinology.