咽頭ノイリノーム—文献的考察ならびに二症例報告

PARAPHARYNGEAL NEURINOMA

　咽頭ノイリノームは咽頭側壁下（副咽頭間隙）に出現する良性腫瘍で，組織学的には神経鞘腫（neurilemmoma）である。国外文献では，Schwannoma of the Pharynx^1），Pharyngeal neurilemmoma^2）Neurilemmoma of Pharynx^3），Neurinoma of the Pharynx^4），Parapharyngeal neurilemmoma^5），Neurinome des Pharynx^6）などと記載されている。

　咽頭ノイリノームについて従来の報告を通覧し，さらに最近東大病院で経験した二症例について報告する。

　Two cases of parapharyngeal neurinoma were reported. The patients had hardly any complaints except for the sense of swelling in the throat and a lump in the upper neck.

　The first case was a 25 year old female. The extirpated tumor weighed 40 gm and measured 6.5 by 5 by 4 cm. A Horner's syndrome occur-red postoperatively.

　The second case was a 35 year old female. The tumor was dumbbell shaped in its contour which measured 4 by 3 by 3 cm at one end and 2.5 by 2.5 by 2.5 cm at the other. The larger part was found to be solid whereas the smaller part to be cystic; it weighed 27 gm.

　Histologically the first case proved to be neurinoma of Antoni type A, while the second to be Antoni type A and B.

　A postoperative complication of hypoglossal nerve paralysis was noted in the second case for the period of 3 months.