The Russian school of dermatology and venereology suffered a great loss: at the age of 98, Nikolai Sergeevich Potekaev, an outstanding scientist, brilliant clinician and teacher, corresponding member of RAS, professor emeritus at PSMU named after I.M. Sechenov, laureate of the Prize of the USSR Council of Ministers, passed away. Professor Potekaev devoted almost 70 years to his profession and was engaged in scientific work until his last days.