Acute and chronic rhinosinusitis: the position of the pediatrician and otolaryngologist. What is new in this field of medicine, what things should not be done, and what is considered obsolete? The first day of a five day training cycle for physicians of SAHI "Children's Municipal Hospital with Perinatal Center" of Nizhnekamsk was opened by Professor of otorhinolaryngology department of Kazan Medical Academy Sergey Mosikhin.