PMC9493334_01
A 74-year-old female with a history of lumbar spinal canal stenosis (Case 1). Cine MRI shows a large movement of the cauda equina in an inchworm-manner during the Valsalva maneuver. The same image is shown in Supplemental Movie 1.
2185-4610-68-135-g001.jpg
PMC9493334_01_2185-4610-68-135-g001.jpg
F1
Cine MRI showed the cauda equina moving in an inchworm-like manner when the patient performed the Valsalva maneuver (Figure 1, Supplemental Movie 1).
A. T2WI shows uterine and bladder prolapses (Case 1). B and C. Cine MRI during the Valsalva maneuver also shows uterine and bladder prolapses (Case 1).
2185-4610-68-135-g002.jpg
PMC9493334_02_2185-4610-68-135-g002.jpg
F2
The cine MRI showed the cauda equina moving in an inchworm manner when the Valsalva maneuver was performed, with movement smaller than observed in Case 1 (Figure 4, Supplemental Movie 2).
A, T2WI (sagittal); B, T1WI (sagittal); C, T2WI (L3/4 axial); D, T2WI (L4/5 axial); E, CT (sagittal bone window setting); F, CT (sagittal soft tissue window setting); G, CT (L3/4 soft tissue window setting); and H, CT (L4/5 soft tissue window setting); (Case 1); spine MRI and CT performed one year before presentation showed severe lumbar spinal canal stenosis at L4/5 due to grade 2 lumbar spondylolisthesis in the Meyerding classification, and moderate stenosis at L3/4 due to grade 1 spondylolisthesis.
2185-4610-68-135-g003.jpg
PMC9493334_01_2185-4610-68-135-g003.jpg
F3
Spine MRI (Figure 3A-D) and CT (Figure 3E-H) performed one year before presentation showed severe lumber canal stenosis at L3/4 and L4/5 due to degenerative spondylolisthesis.
PMC9493334_02
A. T2WI shows uterine and bladder prolapses (Case 1). B and C. Cine MRI during the Valsalva maneuver also shows uterine and bladder prolapses (Case 1).
2185-4610-68-135-g002.jpg
PMC9493334_02_2185-4610-68-135-g002.jpg
F2
The cine MRI showed the cauda equina moving in an inchworm manner when the Valsalva maneuver was performed, with movement smaller than observed in Case 1 (Figure 4, Supplemental Movie 2).
A 73-year-old male (Case 2). The cine MRI shows a small movement of the cauda equina during the Valsalva maneuver. The same image is shown in Supplemental Movie 2.
2185-4610-68-135-g004.jpg
PMC9493334_02_2185-4610-68-135-g004.jpg
F4
The cine MRI showed the cauda equina moving in an inchworm manner when the Valsalva maneuver was performed, with movement smaller than observed in Case 1 (Figure 4, Supplemental Movie 2).
A, CT (sagittal bone window setting); B, CT (sagittal soft tissue window setting); and C, CT (L3/4 axial soft tissue window setting); (Case 2); Moderate lumbar spinal canal stenosis due to L3/4 grade 1 lumbar spondylolisthesis in the Meyerding classification was retrospectively found on abdominal CT performed before prostatectomy.
2185-4610-68-135-g005.jpg
PMC9493334_02_2185-4610-68-135-g005.jpg
F5
LSS due to L3/4 degenerative spondylolisthesis was retrospectively found on abdominal CT performed before prostatectomy (Figure 5A-C).