Intra-spongal hernia - Definition

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An intra-spongal hernia is when an intervertebral disc projects through the body of the vertebra situated below the disc. A rare disease, it affects the spine frequently in the context of the evolution of Scheuermann's disease also called painful vertebral epiphysitis in adolescents. The flattening of the vertebrae in this disease enables the formation of these hernias, which are visible on an x-ray of the spine. These hernias are responsible for pain, and the deformity of the vertebrae that results can cause kyphosis (exaggeration of the natural curvature at the top of the back) which occurs late in its growth.