Hi and welcome to the online community
I didn't have this type of cancer, so don't have any experiences to share with you, but I noticed that your post hadn't had any response so far.
I typed 'de-differentiated chondrosarcoma' into the search bar in this group but, unfortunately, there were only a couple of previous posts which mention it and they're several years old. You could do the same and have a read of them but the people might no longer be part of the community so might not respond if you contact them.
I have found this information for you on treatment for chondrosarcoma which might be of some help to you. You could also post your question in ask a nurse, and one of the specialist nurses will respond within 2 working days, or give your CNS a call for a more tailored response.
Wishing you all the best.
"Never regret a day in your life, good days give you happiness, bad days give you experience"
