特異な視野障害をきたした下垂体腫瘍の1例—自験例と文献的考察

SCOTOMATOUS DEFECTS IN THE CENTRAL VISUAL FIELD, ASSOCIATED WITH PITUITARY TUMOR:A CASE REPORT

　抄録　下垂体周辺における脳外科的疾患による視野障害，殊に下垂体腫瘍による視野障害に関しては，現在に至っても必ずしも十分な解明はなされていない。

　最近われわれは57歳男性で興味ある視野欠損，すなわち左眼で巨大な中心暗点様拡大を認める視野欠損を示した下垂体腫瘍の1例を経験し完治せしめたので報告し，併せて自験下垂体腫瘍46例につき，術前・後の視野変化を比較検討した。

A rare case which showed scotomatous defects in the left central visual field was presented.

A 51 year-old man was admitted to our clinic because of the visual deterioration. In neuroradi-ological examinations the left carotid angiography showed elevation of both A₁ portions and CT suggested pituitary tumor. On February 5, 1980 radical operation was carried out, in which it was confirmed that part of the optic nerve was concave and split longitudinally with a compression of the pituitary adenoma. Postoprative course was uneventful and recovery from the defects in the central visual field was quickly. In this case logitudinal splitting of unilateral optic nerve, caused by gradual compression of supra- or para-sellar tumor, was considered as one cause of scoto-matous defects in the central visual field.

In addition, visual status of forty six cases of pituitary adenoma which had been operated at our clinic during the past fourteen years was analysed both pre- and post-operatively, compared with the case described above.