case_images: PMC8326104_01
case_images: (a and b) Midsagittal view of a T2-weighted (a) and a contrast-enhanced T1-weighted (b) magnetic resonance imaging (MRI) of the lumbar spine demonstrating an intradural extramedullary spinal lesion (white arrowhead) from L1 to L2 with avid contrast enhancement. (c) Axial view of a contrast-enhanced T1-weighted MRI of the lumbar spine demonstrating high-grade compression of conus medullaris and cauda equina from an intradural extramedullary lesion (white arrowhead).
case_images: SNI-12-312-g001.jpg
case_images: PMC8326104_01_SNI-12-312-g001.jpg
case_images: F1
case_images: A gadolinium-enhanced MR imaging (MRI) documented an intradural extramedullary solid lesion with marked gadolinium enhancement extending from L1 to L2, resulting in anterior compression/displacement of the cauda equina/ conus medullaris [Figure 1].
case_images: Postoperative magnetic resonance imaging, sagittal (a) and axial (b) views, confirmed complete tumor removal.
case_images: SNI-12-312-g002.jpg
case_images: PMC8326104_01_SNI-12-312-g002.jpg
case_images: F2
case_images: In addition, the postoperative MRI scans confirmed complete tumor removal [Figure 2].
case_images: Histologic findings of the lesion. (a and b) Show spindle cells, collagen fibers, microcystic changes, and hemosiderin deposits on Hematoxylin Eosin staining (black circle and arrowhead). (c) Shows a Ki67 <1%. (d) shows uniform S-100 protein immunoreactivity.
case_images: SNI-12-312-g003.jpg
case_images: PMC8326104_01_SNI-12-312-g003.jpg
case_images: F3
case_images: Pathology revealed a fusocellular tumor that was compatible with the diagnosis of a schwannoma of the cauda equina [Figure 3].