Objective: To update tonsillectomy incidence rates in Denmark and identify whether the incidence rates vary between geographical areas in the country during the period 1991-2012.Design: This was a retrospective nationwide cohort study using data from the comprehensive Danish patient registries. Data included surgical code, gender and date of birth, date and place of surgery.Setting: Hospitals and private oto-, rhino-, laryngology (ORL) offices.Participants: Danes who underwent tonsillectomy in the period 1991-2012.Main outcome measure: Tonsillectomy.Results: In the 22-year period, 177 211 tonsillectomies were conducted, and the overall incidence of tonsillectomy decreased significantly over time. The overall annual incidence of tonsillectomies decreased from 155.7 per 100 000 inhabitants in 1991 to 129.4 per 100 000 inhabitants in 2012. In 1991, 5.5% of tonsillectomies were performed in office settings, while in 2012, it had increased to 26.6% (P < .01). The highest incidence of tonsillectomy was found in children between 3 and 4 years of age (predominance of males, P < .01) and in 15-to 19-year-olds (predominance of females, P < .01). Each year, 0.44% of children underwent tonsillectomy, and by the age of 20, 7.7% of the Danish people has had a tonsillectomy. There were significant regional differences in the number of tonsillectomies. Conclusion:The incidence rate of tonsillectomies in Denmark decreased significantly in the study period, but with great regional variance.

In this retrospective follow-up study, we present the middle-term results of transoral removal of submandibular calculi by incision in the floor of the mouth together with a patient satisfaction survey. These results will be compared with those of international studies. This is an individual retrospective cohort follow-up study. Forty-two patients had salivary calculi removed by incision in the mouth in the period from August 2009 to July 2012 at the Ear-nose-throat department of the North Zealand Hospital, Hillerød, Denmark. A retrospective study was carried out, focusing on the effects of the surgery and on patient satisfaction. The patients completed a questionnaire and underwent an objective physical exam. We found a high success rate (93 %), high patient satisfaction (94 %) and a high number of patients with no symptoms (92 %). In 94 % of the patients the gland was preserved, and there were no infections. One patient (3 %) suffered from damage to the lingual nerve, and 6 % (n = 2) claimed to suffer from continuous tingling of the tongue. Based on the present study and previous studies on transoral removal of calculi by incision in the floor of the mouth, we find this procedure effective, brief and safe for removal of large, immobile calculi from the hilum of the submandibular gland to the papilla.