causes of osteoma
An osteoma is a new piece of bone usually growing on another piece of bone, typically the skull. It is a benign tumor. When the bone tumor grows on other bone it is known as âhomoplastic osteomaâ; when it grows on other tissue it is called âheteroplastic osteomaâ. Osteoma represents the most common benign neoplasm of the nose and paranasal sinuses. The cause of osteomata is uncertain, but commonly accepted theories propose embryologic, traumatic, or infectious causes.