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As far as the tumor discussion, I think we're both saying the same thing, just from a different perspective. You obviously have more experience with this than myself, as my dog has not undergone that procedure. But as far as I understand it, the 'tumor' IS the bone in a sense.........not really bone, as you have stated, but rather made out of what the bone is changing into in that area. (Not Really bone, but a more honeycombed brittle substance) Which is why (As far as I know) there is a 'hole' left over from the procedure. For if was was truly just a 'growth' on the bone, there would be no recess created from it's removal, no??
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Yes this description is more accurate, especially once the cancer has progressed. But to remove the tumor the bone is also being removed, not just the area affected by cancer. To get clean margins a significant amount of healthy bone surrounding the mass also has to be removed. If the tumor is removed without the clean margins no progress was made. Which is why it would be inethical to try to remove the tumor at this stage. I thougth about posting one of my dogs post op xrays in my photos but the xray has my personal information on it and I'm afraid the mods will not approve. Anyhow, my dogs tumor was very small but there was a lot of bone removed in comparison to area that actually was the tumor.
I realize how much information there is surrounding OS. I am still routinely asking questions of our dogs team of oncologists and learning new things constantly there is no harm in reaching a better understanding of something or gaining more knowledge. Granted I am working on gathering information to maybe write a book on this topic for owners, but still the more I know the more it helps me in terms of being a better owner for my dog with this disease.