What is the normal angle of maximum kyphosis?

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Multiple Choice

What is the normal angle of maximum kyphosis?

Normal thoracic kyphosis is the gentle curve of the mid back. On a lateral spine view, the angle of the greatest posterior convexity—the maximum kyphosis—typically stays under about 40 degrees. This upper limit helps distinguish normal curvature from hyperkyphosis. Angles in the range of 40–60 degrees suggest borderline or mild hyperkyphosis, and above 60 degrees indicates a more pronounced deformity. Since there is natural variation, 45 degrees isn’t used as a strict normal threshold, but the commonly accepted normal maximum is below 40 degrees.

Normal thoracic kyphosis is the gentle curve of the mid back. On a lateral spine view, the angle of the greatest posterior convexity—the maximum kyphosis—typically stays under about 40 degrees. This upper limit helps distinguish normal curvature from hyperkyphosis. Angles in the range of 40–60 degrees suggest borderline or mild hyperkyphosis, and above 60 degrees indicates a more pronounced deformity. Since there is natural variation, 45 degrees isn’t used as a strict normal threshold, but the commonly accepted normal maximum is below 40 degrees.

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