[Prevalence, incidence rate and structure of congenital and hereditary forms of ENT diseases in population of Azerbaijan Republic]. 
The primary field study in Azerbaijan Republic (AR) aimed at registration of the prevalence, incidence rate and structure of congenital and hereditary forms of ENT diseases in population of the AR.  A total of 7725 patients with the above diseases were registered.  The phenotyping frequency of ENT pathology was 94 patients per 100,000.  The highest morbidity was documented for deafness (3571, 47.5%) and hypoacusis (3025, 39.1%), the least--for congenital laryngeal pathology (2, 0.026%).  Congenital and hereditary ENT diseases occurred most frequently in the population of the Lenkoran-Astarin zone, Baku and Baku Region, among refugees, least frequently--in the population of Kuba-Khachmass, Shirvan and Central Aran zones.