Pending diagnosis of chondrosarcoma for 28 year old son

I am devastated and having trouble focusing. My son, who is type 1 diabetic, bipolar I, just got a CT scan and met with an Oncologist that told him that they are confident a tumor (size of a softball) from multiple hereditary exostoses is malignant and in an awkward location. He is going to lose mobility in his dominant shoulder, and I am terrified of losing him to cancer. I found this out on a Thursday afternoon at work. He has had the shoulder pain for over two years he thought it was from an injury from rocking climbing. Over the years I dealt with a serious manic episode that lasted 8 months which was very damaging and now this news about his health. He is getting surgery on 4/27. Has not had the biopsy yet. And supposedly the cancer has not spread to his lungs.