Hyposmia in childhood – a comparative evaluation of performance in the "U-Sniff Test" in children with and without hyperplasia of the lymphoid tissue

Background To date, systematic studies on the cause and prevalence of childhood hyposmia are lacking. The causes this olfactory dysfunction can vary from simple adenoid hyperplasia or a condition following covid-19 infection to rare Kallmann syndrome. Regardless entity, disorders not only severely limit children's quality life but also present diagnostic challenge.