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I.はじめに
下垂体腺腫の鞍上進展に伴う視野障害は視神経,視交叉の構築上の特徴から両耳側半盲を呈することが一般的である1,4,6).しかしながら今回,われわれは急速な視力低下とともに両鼻側下1/4半盲をきたした嫌色素性下垂体腺腫の1例を経験したので,その発現機序について文献的考察を加え検討した.
Visual field defect due to pituitary adenoma ordinari-ly shows bitemporal hemianopsia. But we experienced a case presenting binasal inferior quadrants hemianop-sia.
A 60-year-old woman was admitted to our hospital complaining of headache and blurred vision. At ophthalmologic examination, the visual acuity on the right was 0.02 and on the left 0.3. Visual field showed a loss of bilateral inferior nasal quadrants. There was neither pallor nor edema of either of the optic disks. A computerized tomography (CT) scan showed an en-hancing mass in the intra- and suprasellar region.
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