The Meningiomas of the Lesser Wing of the Sphenoid

Diagnostically as well as therapeutically, meningiomas of the so-called sphenoidal ridge present several difficulties. We therefore make a few remarks concerning the diagnostic aspects of this problem. In another paper we hope to deal with the operative treatment. In a female patient recently seen, after long deliberation, we established a diagnosis of a meningioma of the innermost part of the sphenoidal ridge. This sphenoidal ridge can be divided into three almost equal parts, namely, the inner or clinoidal part, the middle or alary part and the outer or pterional part. In our case we had to deal with an affection having its seat in the inner or clinoidal part. The case was in a Chinese woman, 46 years old, who, a year ago, came to the ophthalmologist with complaints regarding the left eye; the vision was at that time 1/6. She returned a year later with vision 1/60. There existed then on the left side a retrobulbar neuritis with