Introduction: Tonsillectomy is the most frequent surgical procedure performed on children. As a rule, during tonsillectomy performed on children tonsil vegetation is removed, too. The decision on tonsillectomy despite the existing guidelines is still based primarily on the experience of the operator and the evaluation of each individual patient. Today tonsilloadenoidectomy is considered to be a day-surgery procedure. Participants and methods: The final thesis provides a retrospective research on patients who went through tonsillectomy, adenoidectomy, myringotomy and myringotomy with tube placements in patients treated on the Otorhinolaryngology department of the General Hospital in Zadar during 2012-2013. The number of operated patients, sex and age distribution, as well as postoperative complications were registered. During the research period 570 patients went through cold dissection method. The obtained results were shown graphically / on charts. Results: Men dominated in the tested group of patients and made 53% of the patients that underwent surgery. Most patients underwent surgery between the age of four and seven. During the research period 1047 surgeries were performed on 570 patients. The most frequent surgery procedure in our patient group was tonsillectomy performed on 83% of patients, while adenoidectomy was performed on 71% of the operated patients. There were no interaoperative complications, and postoperative complications were recorded in slightly over 6% of the patients that underwent surgery. The most frequent postoperative complication among the patients was the bleeding which was recorded in 4.38% of the patients that underwent surgery. In 0,7 % of the total number of patients that underwent surgery interaoperative revision of the patients was necessary due to bleeding. In our patient group infection was mostly related to the bleeding, in almost one third of the patients who had postoperative blood discharge from the wound. None of the patients needed blood transfusion after the surgical wound bleeding. The bleeding was usually recorded on fourth or fifth day post-surgery. The average age of the patient with postoperative bleeding was 10 years. Apart from the bleeding, infection was recorded as a postoperative complication in 3,5% of the patients that went through surgery. Conclusion: Tonsil surgery is most frequently performed between the age of four and seven. The patients that underwent surgical procedure are mostly male. The most frequent postoperative complications are bleeding and post infection of the postoperative incision, and one third of the patients had both bleeding and infections. Only 0,7 % of the patients needed revision surgery of the surgical wound after bleeding.