PMC8202374_01
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
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F1
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].
Postoperative images; follow-up magnetic resonance images at 6 months (a-c) showing no evidence of disease and a posterior pseudomeningocoel
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F2
However, a pseudomeningocele was seen over the dura from L5 to S2 [Figure 2a-c].
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)
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F3
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].