異常S状静脈洞からの耳出血

A CASE OF HEMORRHAGE FROM ABNORMALLY LOCATED SIGMOID SINUS

　I．はじめに

　耳出血は通常外耳道上皮からのもので中耳腔からのものは少ない。hemotympanumは外傷，血液疾患，腫瘍，コレステロール中耳炎末期例^1）などに起こりうるが，最近，稀な，異常S状静脈洞の洞壁からの出血によりhemotympanumとなり，さらに耳出血をきたしたと考えられた1例を経験した。若干の考察を加えたので，報告したい。

　A 36-year-old female developed continuous bleeding from the right middle ear for two months following acute otitis media.

　Surgery revealed that the bony wall of the sigmoid sinus and the mastoid air cells had disappeared and the bulding sigmoid sinus occupied the whole mastoid. It was thought that the hemorrhage occured due to inflammation of the wall of the sigmoid sinus at the antrum.

　For strengthening the wall. and blocking the aditus ad antrum. a flap of the temporal muscleand gelfoam was inserted between the sigmoid sinus and the bony wall of the middle cranial fossa and the external auditory meatus.

　Hemotyrnpanum disappeared and has not recurred during 2 years postoperatively.