Can a calcification in the knee be mistaken for osteosarcoma, or vice versa?

I have an unknown mass located at the end of my femur, with involvement of my knee. I am being referred to an orthopaedic oncologist based on the results of my x-rays and MRI. Are calcifications of old injuries easy to diagnose or is this more likely an osteosarcoma?

It might be a osteosarcoma but if you are under 45 years of age and because the mass is on the end of a long bone then another strong possibility is that it might be a giant cell tumor. Giant cell tumors are not malignant but still are still a difficult tumor to remove. Osteosarcomas are malignant and will require additional treatment besides tumor removal.

http://www.emedicine.com/radio/topic307....

http://www.emedicine.com/orthoped/topic5...

They won't be able to be 100% sure what it is until they take a biopsy and you need to get the biopsy done as soon as possible, because if it is an osteosarcoma then you need treatment sooner rather than later for the best outcome. Suggest you go to a large medical facility and be treated only by an orthopedist who specializes in bone tumors because you may need significant reconstructive surgery and this requires an expert surgeon. good luck

Yes it can be. I suggest you get it biopsied.

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