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  • Author or Editor: John A. Feldenzer x
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John A. Feldenzer, John E. McGillicuddy and Jonathan W. Hopkins

✓ A case of giant sacral meningioma with presacral and lumbar extension is presented. The difficulties in diagnosis and management are emphasized including the staged multidisciplinary surgical approaches and preoperative tumor embolization.

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John A. Feldenzer, Paul E. McKeever, Dennis R. Schaberg, John A. Campbell and Julian T. Hoff

✓ An experimental model of spinal epidural abscess was developed in rabbits by injecting Staphylococcus aureus into the posterior thoracolumbar epidural space. This model has been shown to reproduce the neurological, bacteriological, and radiological aspects of the human disease. In this study, the effect of the infectious epidural mass on the vasculature of the spinal cord in paraplegic rabbits was studied using microangiographic techniques. The normal vascular anatomy of the rabbit spinal cord was defined in control experiments. Vascular proliferation was demonstrated in the epidural space surrounding the abscesses. Anterior and paired posterior spinal arteries remained patent in paraplegic rabbits with mild or moderate spinal cord compression and in some cases of severe compression. In animals with severe compression, the anterior epidural venous plexus remained patent, but the dorsal spinal vein was occluded. Occlusion of perforating arteries occurred only with extreme spinal cord compression. These data indicate that the initial neurological deficit associated with experimental spinal epidural abscess is not due to vascular thrombosis.

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Michael N. Bucci, John A. Feldenzer, William A. Phillips, Stephen S. Gebarski and Robert C. Dauser

✓ An unusual case of atlanto-axial rotational limitation secondary to an osteoid osteoma of the axis is presented. Transoral microsurgical resection followed by physical therapy improved the clinical symptoms. This case illustrates several unique problems within the cervical spine as well as the efficacy of the transoral approach to the axis.