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Show ' ollnlal 0/ Clllllcal NClIro · ophlhalmology 8( 1): 6i- 68. 1988. Neuro- anatomical Feature Photo The " Phantom" Optic Nerve Demonstration in CT and MR Scans 19 Years After Resection of Optic Glioma Michael C Brodsky, M, D" William F, Hoyt, M. D., and Diane R. Newton, M. D. .,. 1988 Raven Press. Ltd., New York In 1968, a 13- year- old girl with neurofibromatosis had complete resection of her left optic nerve ior an optic glioma. The nerve was sectioned at the back oi the globe and immediately in iront oi the chiasm. Histologic details oi the tumor were reported by Anderson and Spencer ( 1). In 1987, orbital computed tomography ( eT) and FIG. 1. A" iaJ CT section through the mid- orbits showing a normal right optic nerve image ( on the left) and a linear soft tissue structure traversing the intraconal space of the left orbit ( arrow). A soft tissue density is also seen in the left orbital apex. Reformatted coronal and oblique sagittal images ( below) of the left orbit show a small dense optic nerve- like structure in the intraconal space ( arrows). From the Neuro- ophthalmology Unit ( M. C. B., W. F. H.) and the Neuroradio) ogy Section ( D. R. N.). Universitv of California. San Francisco. San Francisco, California, U. S. A: Address correspondence and reprint requests to Dr. William F. Hoyt at M- 876, UCSF Medical Center, San Francisco, CA 94143, USA 67 FIG. 2. T- 1- weighted ( TR = 600, TE = 20) axial Images of the orbits ( upper two images) show a normal right optic nerve ( middle image) and a thin, intraconal, low- intensity structure ( black arrows) in the left orbit. In the coronal plane there is a definite low- signal- intensity structure in the middle of the left orbit ( arrow). magnetic resonance ( MR) scans of this patient ( Figs. 1 and 2) showed the so- called " phantom optic nerve" described previously in this journal by Shedden et al. ( 2) and Levin et al ( 3), |
