Exostosis, also known as excess bone growth, is a medical condition characterized by the outward growth of bone, resulting in thickening of the affected area. This condition can manifest as a palpable lump or an area of increased thickness. Exostosis can occur at any age and stage of life, with varying levels of symptoms or no symptoms at all.
Understanding Exostosis: A Benign Bone Growth
Exostosis, also referred to as a bone spur or osteophyte, is a non-cancerous growth of bone that forms on top of existing bone. It is considered a benign tumor and is quite common, affecting approximately 3% of the population. While exostosis can occur in various parts of the body, it is most frequently found in the lower extremities, particularly the hips and feet. However, it can also develop in the jaw, sinuses, and ear canal.
Exostosis is often a result of joint damage caused by arthritis, and it can manifest later in life. Despite being non-cancerous, these bony growths can cause discomfort and pain, especially when they impinge on nearby nerves or tissues. Thus, prompt medical attention is necessary if symptoms arise.
Causes of Exostosis
Exostosis, or the formation of bony growths on a bone, can be attributed to various factors. One common cause is a previous injury to the affected bone, which prompts the development of exostosis at the site of the injury. Another cause is chronic irritation to a bone, which can also lead to the formation of bony growths.
In addition to these factors, there is a hereditary form of exostosis known as hereditary multiple exostoses. This type of exostosis is passed down from parent to child and is characterized by the appearance of multiple bony growths during childhood. Individuals with this condition may have numerous exostoses throughout their skeletal system.