Benign Mouth Tumors AND HOW THEY GROW
A benign tumor of the oral cavity is a non-cancerous growth that does not spread to other parts of the body and is not usually life-threatening.
There are several different types of oral cavity tumors:
1. Hyperplasias
Hyperplasia is an increase in the number of normal cells, and such growths are very common in the mouth. It is usually caused by irritation or injury to oral cavity tissue.
There are two types: fibromas, which can occur anywhere, and pyogeneic granulomas, which usually occur on the gums.
2. Papillomas
Papillomas develop from epithelial cells that line the inner surface of the oral cavity.
They are wart-like growths often associated with human papillomavirus (HPV).
3. Pleomorphic adenomas
These benign tumors develop from the minor salivary glands scattered on the inner surface of the oral cavity or from the major salivary glands.
Also called mixed tumors, they are slow-growing and painless masses.
4. Soft tissue tumors
These tumors start in the different soft tissues that lie beneath the lining of the mouth, such as blood vessels and fat.
Most are soft to the touch and painless.
5. Benign odontogenic tumors and cysts
Odontogenic tumors and cysts are often benign and occur mostly in the jaw bones (mandible and maxilla).
They start from the tooth-forming tissues and may be caused by abnormal development of the jaw bone.
6. Benign tumors of the bone
These tumors occur in the jaw bones (maxilla and mandible).
There are two types: osteoma, found on the skull and facial bones, and ossifying fibromas, which develop in the lower jaw bone or mandible.
An osteoma may cause symptoms when it grows into the surrounding tissues.
Source: Canadian Cancer Society
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