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(kīfō`səs): see hunchbackhunchback,
abnormal outward curvature of the spine in the thoracic region. It is also known as kyphosis and humpback, and in its severe form a noticeable hump is evident on the back.
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curvature of the spine in man, with the convexity of the curve posterior.

The entire spine of the newborn is arced (total physiological kyphosis). As the infant develops, physiological kyphosis arises in the thoracic and sacral sections. Kyphosis in the thoracic spine may increase dramatically by old age because of developmental changes in the intervertebral disks and a weakening of muscle tone.

Pathological kyphosis, a result of congenital abnormalities in spine development (additional wedge-shaped vertebrae or the fusion of separate vertebrae), usually appears after the age of six months, once the infant has begun to stand and walk. Kyphosis can result from rickets, spinal tuberculosis, and certain familial conditions. It can also develop in persons who sit bent over for long periods of time because of occupation or myopia. Kyphosis is treated by special gymnastic exercises and by strengthening the back muscles by massage or physical therapy. Surgery may have to be performed if more conservative treatment proves unsuccessful.


Angular curvature of the spine, usually in the thoracic region. Also known as humpback; hunchback.
References in periodicals archive ?
However, AP values were significantly higher in the osteoporosis group with kyphotic compared to the osteoporosis group without kyphosis and controls (Table 3).
A slouched, kyphotic posture is typified by posterior pelvic tilt, a posture that loads the sacrum and coccyx while seated (Figure 3(b)) [40-41].
The spine is kyphotic (or hunched), and the child tends to tilt to one favorite side with the upper part of the body.
Treatment of kyphotic deformity in ankylosing spondylitis.
Oda and colleagues compared the effects of a kyphotic posterolateral fusion to a sagittally balanced in situ fusion in the lumbar spine of sheep.
2,15) Moreover, vertebroplasty does not always restore vertebral body height or improve the kyphotic deformity (3,16) and compared with kyphoplasty, vertebral body height restoration and reversal of kyphosis rates appears to be inferior.
The GEM Suite coils are flexible so they conform to the patient's body and we especially like the Comfort Tilt Head/Neck coil that finally allows us to comfortably scan kyphotic patients.
Outcome measurements were vertebral body height, segmental kyphotic angle, extravasation rates, pain, function and quality of life.
But this posture results in the loss of spinal alignment, with the spine assuming a C-curve, "slumped" posture, or a kyphotic position, with the shoulders rounded forward.
This kyphotic posture increases trunk moment and disk deformation and leads to increased intradiscal pressure and pain [8,16].
This can be associated with a kyphotic deformity, truncal shortening, and, in some cases, neurologic compromise.