The object in presenting the case reported here is to demonstrate several features of the diagnostic syndrome which have not been reported in the ophthalmologic literature. Cushing and Eisenhardt1 classify meningiomas of the sphenoid ridge according to their origin from the lesser wing (ala parva) of the sphenoid bone or from the greater wing (ala magna). The lesions of the outer, or pterional, third are of two widely differing types: (1) the flat, spreading tumor (meningioma en plaque) which provokes hyperostosis, chiefly of the greater wing of the sphenoid bone, and (2) the large spherical tumor (meningioma global) which expands within the crotch of the sylvian fissure. Why the meningioma en plaque favors the outer third of the ridge and induces bony overgrowth is not known. Associated factors thought to be related are that the bone of the ala magna is highly vascular, the adjacent dura extremely thick and
SMITH JW. MENINGIOMA PRODUCING UNILATERAL EXOPHTHALMOS: SYNDROME OF TUMOR OF THE PTERIONAL PLAQUE ARISING FROM THE OUTER THIRD OF THE SPHENOID RIDGE. Arch Ophthalmol. 1939;22(4):540–549. doi:10.1001/archopht.1939.00860100024002
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