PMC6108162_01
Preoperative MRI scan in sagittal (a and b) and transverse plane (c) showing intraspinal and paraspinal masses at levels L5 and S1
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F1
In particular, the lumbosacral MRI revealed a perineural cyst of the sacrum, and a large calcified mass dorsal to S1 vertebral body [Figure 1].
Microphotography of pathohistological section of removed intraspinal and paraspinal masses presented with hematoxylin-eosin staining, magnification of x100 (a) and x200 (b)
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F2
The pathohistological examination confirmed collagen fibers (accounting for the fibrinous external layer) covered by frank calcium deposits consistent with the diagnosis of calcinosis [Figure 2].
Control MRI scan, 5 years after initial tumor occurred, in sagittal (a and b) and transverse plane (c), revealed no recurrence of tumors
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F3
Five years later, the MRI again confirmed no recurrence of calcification [Figure 3].