CT scan in the sagittal plane of two<unk> . The small<unk> at the inferior endplate of the L3 vertebral body (arrow) has typical features, being broad-based at the endplate, with well-defined contours and thin marginal sclerosis. A large and less typical<unk> (arrowhead) is observed at the superior endplate of L4.<unk>  can be detected with X-rays, although they can be imaged better by CT or MRI. They are considered to be vertical disc herniations through the cartilaginous vertebral body endplates.<unk>  can sometimes be seen radiographically, however they are more often seen on MRI, even when not visible on plain X-rays. They may or may not be symptomatic, and their etiological significance for back pain is controversial. In a study in Spine by Hamanishi, et al.,<unk>  were observed on MRI in 19% of 400 patients with back pain, and in only 9% of an asymptomatic control group. The authors concluded that<unk>  are areas of "vertical disc herniation" through areas of weakness in the endplate.
Schmorl's nodes
Bouchard's nodes
Heberden's node
Koeppe's nodules
Bergmeister's papilla
Osler's node
Roth's spot
Bjerrum's area