K09: Cysts of oral region, not elsewhere classified

K09.2: Other cysts of jaw

The jaw consists of the upper jaw and lower jaw. The upper jaw bone is located above the mouth and forms the roof of the oral cavity. The lower jaw bone is located below and to the side of the mouth. In the center of the lower jaw is the chin. To the side, the lower jaw bone extends to below the ears. The mandibular joint is located there.

Cavities can develop in the jaw bone. The cavities can be filled with fluid. Possible reasons for cavities in the jaw bone are, for example, injuries or growth disorders.