Extreme posterior curvature of the thoracic area of the spine, commonly known as roundback, is:

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Kyphosis is the excessive posterior curvature of the thoracic spine, resulting in a rounded back appearance. Lordosis is an excessive anterior curvature of the lumbar spine, resulting in an inward curve of the lower back. Scoliosis is a lateral curvature of the spine. Spinal stenosis refers to a narrowing of the spinal canal or neural foramina.

Extreme Posterior Curvature of the Thoracic Area of the Spine