Herniated nucleus pulposus (HNP), also referred to as a herniated disc, is a common spine pathology that occurs approximately 95% of the time at the L4-L5 or L5-S1 level (Fisher et al., 2004; Asch ...

Note the large disk herniation that has migrated from the L5-S1 level caudally to the S1 vertebral level. Also note the prominent compression and distortion of the thecal sac, resulting in the ...

S1 Radiculopathy Due to Adenocarcinoma: A Case Study ... The MRI scan demonstrated evidence of mild degenerative disc disease at the L4-L5 and L5-S1 interspace without significant ...

L5-S1 nonunion was seen in 1 patient who had bilateral S2AI screw loosening in the sacrum. No patients developed fusion across the sacroiliac joint or developed screw back out or breakage.

Results published in Orthopedics showed facet joint osteoarthritis was associated with a higher multifidus muscle-fat index, as well as bilateral multifidus size asymmetry. “Facet joint ...