An<unk>  (plural: <unk>  is the formation of new bone on the surface of a bone.<unk>  can cause chronic pain ranging from mild to debilitatingly severe, depending on where they are located and what shape they are.
When used in the phrases "Cartilaginous<unk> " or "Osteocartilaginous<unk> ", it is considered synonymous with Osteochondroma. (Some sources consider the terms to mean the same thing even without qualifiers, but this interpretation is not universal.)
Exostosis
Hyperostosis
Heterotopic ossification
Pseudolesion
Pica
Hyperplasia
Desmoplasia
Intramembranous ossification