case_images: PMC8202374_01
case_images: Preoperative images; magnetic resonance image (a-e) T1-weighted image sagittal (a), T2-weighted image sagittal (b), T1-weighted image contrast showing enhancement (c), short-time inversion recovery suggestive of intratumoral bleed, T2-weighted image coronal showing foraminal extension (e), noncontrast computed tomography lumbosacral spine (f) showing anterior vertebral body scalloping and thinning of posterior elements
case_images: AJNS-16-44-g001.jpg
case_images: PMC8202374_01_AJNS-16-44-g001.jpg
case_images: F1
case_images: L5, S1, S2 vertebral bodies, and thinning of posterior vertebral elements. Laterally, it is bulging in bilateral S1, S2 neural foramina [Figure 1e]. T2W/ short tau inversion recovery (STIR) and isointense on T1W is noted in the mid part of the lesion, suggestive of hemorrhage [Figure 1d]. There is a nodular thickening of S1, S2 exiting nerve root with postcontrast enhancement. Screening MRI of the whole spine was within the normal limits [Figure 1a-e].
case_images: Postoperative images; follow-up magnetic resonance images at 6 months (a-c) showing no evidence of disease and a posterior pseudomeningocoel
case_images: AJNS-16-44-g002.jpg
case_images: PMC8202374_01_AJNS-16-44-g002.jpg
case_images: F2
case_images: However, a pseudomeningocele was seen over the dura from L5 to S2 [Figure 2a-c].
case_images: Microscopic histopathological examination image showing round to polygonal meningothelial cells with abundant clear cytoplasm arranged in a patternless pattern with prominent blocky perivascular and interstitial collagen bundles (a, low power field), and (b, high power field)
case_images: AJNS-16-44-g003.jpg
case_images: PMC8202374_01_AJNS-16-44-g003.jpg
case_images: F3
case_images: On histopathological examination, images showing a tumor comprise of round to polygonal meningothelial cells with abundant clear cytoplasm arranged in a patternless pattern with prominent blocky perivascular and interstitial collagen bundles [Figure 3].