Updated December 29, 2014.

Definition:

Generally, kyphosis means an abnormal rounding forward of the shoulders and upper back.

This type of kyphosis is the most common and causes a loss of height and interference with breathing.
Technically, the term kyphosis can be used to describe any abnormal curve of the spine that goes in the backwards direction. So, in some instances kyphosis can be used to describe a reversal of the low back curve.
The term kyphosis also refers to the type of curve formed by the sacrum and the thoracic spine.

When used this way, kyphosis refers to normal curvature. When looking at a side view of the spine, the direction of a kyphosis will be backwards.
Many things can cause kyphosis, including:

• trauma
• developmental problems
• disease
• compression fractures of the vertebrae
• arthritis
• other spinal problems, including scoliosis
• other problems and conditions

Teenagers have their own form of kyphosis called Scheuermann's disease.
Also Known As: hunchback, postural kyphosis, Scheuermann's disease