5156a, arthrosis, back, backbone, backs, block, bone, bones, bowl, break, breaks, broken, cauda, caudal, column, columns, cuada, equina, exh5156a, facet, facets, fracture, fractured, fractures, ganglion, joint, joints, low, lower, lumbar, nerve, nerves, nervous, neurological, neurology, neurology/neurosurgery, pelvic, pelvis, root, roots, sacral, sacrum, spinal, spine, spines, spinous, systems, vertebra, vertebrae, vertebral, zygopophyseal, 2