Hello @fionap and welcome to Mayo Connect. I see that you have been diagnosed with Chondro Sarcoma in the pelvis. Is this a new diagnosis for you? Were you having pain that led to this diagnosis?

I found some information on this rather rare disorder on the NIH website. Here is the link to that information,
https://www.cancer.gov/pediatric-adult-rare-tumor/rare-tumors/rare-bone-tumors/chondrosarcoma
Is there currently a treatment plan in place?