case_images: PMC11242012_01
case_images: Typical images of Case 1. An anteroposterior plain radiograph revealed the obscure boundary of the left L5 pedicle (A). Lateral plain radiograph revealed Meyerding grade 1 spondylolisthesis (B). Sagittal and axial computed tomography (CT) images of the lumbar spine showed right spondylolysis (C) and right pediculolysis [(D,E), white arrowheads] of the L5 vertebra. Postoperative CT demonstrated that bony fusion occurred at the L5-S1 interbody space (F) and at the preoperative site of pedicle cleft (G,H).
case_images: fsurg-11-1357282-g001.jpg
case_images: PMC11242012_01_fsurg-11-1357282-g001.jpg
case_images: F1
case_images: Anteroposterior and lateral x-rays showed poor visualization of the left L5 pedicle and a Meyerding grade 1 spondylolisthesis at the L5, respectively (Figures 1A,B). CT showed a right spondylolysis of L5 and a left pediculolysis at the same vertebra with surrounding hyperostosis and sclerosis, especially at the edges of the pedicle defect area (Figures 1C-E).
case_images: Typical images of Case 2. An anteroposterior plain radiograph revealed the obscure boundary of the L5 left pedicle (A). Lateral plain radiograph revealed Meyerding grade 1 spondylolisthesis (B). Sagittal and axial computed tomography (CT) images of the lumbar spine showed right spondylolysis (C) and right dysplasia (D,E) and the pedicle cleft (white arrowheads) of the L5 vertebra. T2-weighted sagittal magnetic resonance imaging of the left pedicle showed a hypointense signal of the cleft (F). Postoperative CT demonstrated that bony fusion occurred at the preoperative pedicle cleft (G,H) site.
case_images: fsurg-11-1357282-g002.jpg
case_images: PMC11242012_02_fsurg-11-1357282-g002.jpg
case_images: F2
case_images: X-rays showed Meyerding grade 1 spondylolisthesis of the L5, poor visualization of the left L5 pedicle, and spondylolysis on the right side (Figures 2A,B). CT showed a hypoplastic change of the left L5pedicle, a defect at the junction between the pedicle and vertebral body, and a minor hyperplastic change on the margin (Figures 2C-E). MRI showed hypointense of the pedicle cleft on both T1- and T2-weighted images without surrounding inflammatory changes (Figure 2F). At 1 year follow-up, CT showed a well-positioned internal fixation and a trend toward fusion at the pedicle cleft (Figures 2G,H).
case_images: PMC11242012_02
case_images: Typical images of Case 2. An anteroposterior plain radiograph revealed the obscure boundary of the L5 left pedicle (A). Lateral plain radiograph revealed Meyerding grade 1 spondylolisthesis (B). Sagittal and axial computed tomography (CT) images of the lumbar spine showed right spondylolysis (C) and right dysplasia (D,E) and the pedicle cleft (white arrowheads) of the L5 vertebra. T2-weighted sagittal magnetic resonance imaging of the left pedicle showed a hypointense signal of the cleft (F). Postoperative CT demonstrated that bony fusion occurred at the preoperative pedicle cleft (G,H) site.
case_images: fsurg-11-1357282-g002.jpg
case_images: PMC11242012_02_fsurg-11-1357282-g002.jpg
case_images: F2
case_images: X-rays showed Meyerding grade 1 spondylolisthesis of the L5, poor visualization of the left L5 pedicle, and spondylolysis on the right side (Figures 2A,B). CT showed a hypoplastic change of the left L5pedicle, a defect at the junction between the pedicle and vertebral body, and a minor hyperplastic change on the margin (Figures 2C-E). MRI showed hypointense of the pedicle cleft on both T1- and T2-weighted images without surrounding inflammatory changes (Figure 2F). At 1 year follow-up, CT showed a well-positioned internal fixation and a trend toward fusion at the pedicle cleft (Figures 2G,H).