The following information may help to address your question:
Prognosis and long-term survival can vary greatly from person to person. Generally, the prognosis for a person with HMO is favorable. Most often, osteochondromas stop growing at skeletal maturity.Most individuals with HMO have at least one surgery and many have multiple surgeries. Painful osteochondromas that do not affect the surrounding bone can simply be removed. Complete removal can help to avoid recurrence of the tumor and abnormal bone growth. Osteochondromas that affect the surrounding bone, tissues, and/or nerves may be more difficult to remove and the outcome of surgery depends on the extent of the disease, the size and location of the tumor, and the tumor’s response to therapy. If an osteochondroma becomes a cancerous tumor (osteosarcoma), the outcome is also less certain. Prompt medical attention and aggressive therapy are important for the best prognosis. Continuous follow-up care is essential for a person diagnosed with multiple osteochondromas.