Can an osteoma become malignant?

An osteoma is a benign bone tumor that does not become malignant. Treatment is only necessary if the tumor interferes with normal function.1

In contrast, an osteochondroma, while usually benign, can rarely become malignant in adulthood, developing into a chondrosarcoma. Similarly, an osteoclastoma is a bone tumor that is potentially malignant, with a small percentage capable of metastasizing to other parts of the body.23