3 doctors weighed in:
How do you know if somebody has osteochondroma or osteosarcoma? Do you have to wait for biopsy results?
3 doctors weighed in

Dr. Ilya Iofin
Orthopedic Surgery
1 doctor agrees
In brief: Almost never
Osteochondroma and osteosarcoma look very different on x-ray, ct and mri.
Osteochondroma can be confidently diagnosed with imaging alone. There is <1% chance of an osteochondroma turning into a chondrosarcoma. In that rare event, it's usually a low grade one that almost never spreads. For osteosarcoma, there is usually strong suspicion based on imaging, but a biopsy is needed to confirm.

In brief: Almost never
Osteochondroma and osteosarcoma look very different on x-ray, ct and mri.
Osteochondroma can be confidently diagnosed with imaging alone. There is <1% chance of an osteochondroma turning into a chondrosarcoma. In that rare event, it's usually a low grade one that almost never spreads. For osteosarcoma, there is usually strong suspicion based on imaging, but a biopsy is needed to confirm.
Dr. Ilya Iofin
Dr. Ilya Iofin
Thank
Dr. Gregory Hines
Family Medicine
In brief: Yes
You do.

In brief: Yes
You do.
Dr. Gregory Hines
Dr. Gregory Hines
Thank
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