What is an exostosis?

Exogenous osteochondroma, also known as exostosis, is one of the most common bone tumors in clinical practice. It is a bony protrusion on the surface of the bone, the top of which is covered by a cartilaginous cap. The cause of exochondroma is unclear at this stage. Most of its osteochondroma is often found in children or adolescents, and 70 to 80% of patients occur under the age of 20. Exogenous osteochondroma, its symptoms patients generally do not consciously pain symptoms, no tenderness, can touch the hard mass is its clinical characteristics. Larger tumors sometimes visible subcutaneous bone processes, when the tumor is too large or due to the special anatomical site, can produce corresponding clinical symptoms and signs, such as compression of surrounding blood vessels and nerves, resulting in local numbness and weakness and other uncomfortable performance.