Sinusitis.
D001987:Bronchiectasis / Q000150:complications; D002648:Child; D002908:Chronic Disease; D006801:Humans; D010256:Paranasal Sinuses / Q000033:anatomy & histology; D012852:Sinusitis / Q000150:complications / Q000209:etiology / Q000601:surgery / Q000628:therapy; D007507:Therapeutic Irrigation