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I.はじめに
Rathke's cleftは正常な下垂体にも13-22%8,24,25)の頻度でみられるといわれている.ところがそれが増大し嚢腫として見つかった例は稀で,1913年Goldzieher9)が剖検例で報告して以来,現在まで少なくとも45例の報告がなされている.本邦では1977年Yoshidaら31),1979年伊関ら13),斎藤ら23)の3例が報告されているにすぎない.
ところで無症状で発見されたRathke's cleft cystは剖検時偶然見つかったものがほとんどであるが,われわれはsubclinical pituitary adenomaの疑いで手術をしたところRathke's cleft cystと診断した1症例を経験したので報告する.
A 17-year-old male was admitted to the Department of Neurosurgery, Hiroshima University Hospital because of an enlarged sells turcica which had been pointed by the skull x-ray examination performed for the facial contusion at the traffic accident. CT scan revealed an oval shaped area of hyperdensity in the center of the sella without any extrasellar extensions. After contrast administration this area showed almost no increased density. The patient had no neurological abnormalities except for hyposmia and left blindness due to the traffic accident. Endocrinological studies were normal.
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