術後性口蓋嚢腫の2症例

POSTOPERATIVE PALATINE CYST, A REPORT OF TWO CASES WITH ITS ETIOLOGY

　I．緒言

　術後性頬部嚢腫の報告は久保氏の命名以来多数あるが^1），その大部分は頬部腫脹の型をとつたものであり，腫脹が口蓋のみに出現したいわゆる術後性口蓋嚢腫^1）の症例はきわめて稀で，私どもが調べた本邦文献で明らかな記載のあるものは僅かに4例にすぎない^2）〜5）。最近私どもはこれに該当する2症例を経験したので，その成因について若干の考察を加えて報告する。

　We have experienced two cases of postoperative palatine cyst, which falls in the range of the postoperative maxillary cyst.

　The first case was a male, aged 37, who complained of a swelling of the right hard palate which occurred 14 years after the initial sinus operation. The second case was a male, aged 50, who also complained of a swelling of the right hard palate that occurred 8 years after the second operation of right sinuectomy.

　The occurrence of postoperative palatine cyst is so rare that we were able to find only four similar cases reported in the literature of this country.

　We arrived at the following conclusions on the pathogenesis of the postoperative palatine cysts. Our cases revealed an excellent pneumatization of the maxillary sinus towards inferiorly and medially reaching beneath nasal floor. In such a condition it is highly possible to leave some of the mucosa in the medial inferior parts of the sinus at the time of the previous operation, and the resulting cyst will easily extend toward the palate because of the thinness of the palatal process of the maxilla.