dermoid cyst

Dermoid cysts commonly occur in the ovaries. They can contain fragments of cartilage, bone, and, in this case, a whole tooth.

The dermoid cyst - A noncancerous tumour with a cell structure similar to that of skin. The growth contains hairs, sweat glands, and sebaceous glands. Dermoid cysts may also contain fragments of cartilage, bone, and even teeth.

The cysts can occur in various parts of the body, but they are most commonly found in the ovaries and on the skin around the head or neck, causing small, painless swellings. Dermoid cysts only rarely become cancerous. Surgical removal of the cysts is usually recommended. (See also teratoma.)