To the Editor.
—Hamed et al,1 in their fine May 1992 article, describe the magnetic resonance (in one patient) and echographic (in two patients) appearances of a "heretofore unreported" fluid compartment extending into the orbit from the fenestration site after orbital optic nerve decompression for pseudotumor cerebri. The echographic appearance of a patent surgical subarachnoid-orbital shunt was actually shown as far back as 1976,2 albeit using a cruder and now obsolescent echographic instrument.
Skalka H. Neuroimaging of the Optic Nerve After Fenestration for Management of Pseudotumor Cerebri. Arch Ophthalmol. 1993;111(2):161. doi:10.1001/archopht.1993.01090020015002
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