PMC5977050_01
Sagittal T2-weighted MRI of the lumbosacral spine shows a large intracanalar epidural hypointense mass at L5 to S4, extending into the presacral space (blue arrows).
CRIRA2018-4257012.001.jpg
PMC5977050_01_CRIRA2018-4257012.001.jpg
fig1
The tissue involved sacral nervous roots (Figure 1) and the sciatic nerve (Figure 2).
Axial T2-weighted MRI reveals anterior mass extension into the paraspinous soft tissues (yellow arrows), involving the sciatic nerve (blue arrow), which is thickened.
CRIRA2018-4257012.002.jpg
PMC5977050_01_CRIRA2018-4257012.002.jpg
fig2
The tissue involved sacral nervous roots (Figure 1) and the sciatic nerve (Figure 2).
(a) Sagittal T1-weighted MRI shows a hypointense intracanalar and presacral infiltrating mass. (b) Postcontrast T1-weighted sagittal image with fat suppression shows heterogeneous enhancement of the mass and sacral vertebrae.
CRIRA2018-4257012.003.jpg
PMC5977050_01_CRIRA2018-4257012.003.jpg
fig3
The infiltrating mass was hypointense in T1- and T2-weighted images and enhanced after contrast (Figure 3).
Sagittal T1-weighted image (a) and sagittal postcontrast T1-weighted image with fat suppression (b) show a significant tumor mass volume reduction after treatment.
CRIRA2018-4257012.004.jpg
PMC5977050_01_CRIRA2018-4257012.004.jpg
fig4
The MRI evaluation revealed a significant tumor mass volume reduction at that time (Figure 4).