Tonsillectomy is a frequent operation in otolaryngology, and the most serious complication is post-tonsillectomy hemorrhage. This time, we reviewed 246 patients who underwent tonsillectomy performed by the same surgeon. Postoperative hemorrhage occurred in 17.8％ of patients ; the hemorrhage group was older, and the indication was more common for patients with chronic tonsillitis. The most common time of occurrence was after discharge, and the longest was 8 days after surgery. In addition, hemorrhage was more frequent among specialists than general doctors. Since hemorrhage was particularly common on the third day after discharge, we consider that it is important to give the patient sufficient guidance on diet and lifestyle. In addition, the reason why hemorrhage was common among specialists may have been that the surgery was performed independently and that careful procedures and hemostasis could not be confirmed, so we consider that self-checking during surgery is necessary.

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City Hospital 1.6% of dermoid cysts of the whole body occur in the oral floor. Usually in Japan, dermoid cysts in the oral floor are divided into three groups according to Hagizaki's classification : subglossal type, submental type and subglossal-submental type. Recently, we treated one patient with the subglossal-submental type of dermoid cyst and another patient with the subglossal type and submental type of dermoid cyst. In consideration of these cases, although Hagizaki's classification is helpful for deciding the surgical procedure for oral floor cysts, we had two questions regarding the classification. The first one is that the submental type, which is anatomically located outside the oral floor, is placed in the category of oral-floor dermoid cysts. The second one is that the anatomical site of the subglossal-submental type remains obscure in the existing literature regarding oral floor cysts. These issues cause confusion in the literature on oral-floor cysts. This paper proposes a revision to the Hagizaki classification to eliminate the problem.

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