Thoracic kyphosis is defined as the angle between the superior endplate of T4 and the inferior endplate of T12.
Normal values
In healthy adults, thoracic kyphosis is 41°± 12°1.
Figure
EnlargeSchematic illustration for measuring cervical lordosis, thoracic kyphosis, and lumbar lordosis. Figure adapted from Greenberg M, ed. Handbook of Neurosurgery. 9th Edition