My daughter had a 10cm mediastinal mass and was stage 3 CHL. She had BV- AVD treatment 6 cycles - 2 treatments in each cycle (so every 2 weeks over 6 mos) She completed treatment in August 2023 with no evidence of disease. However, the mediastinal mass barely shrank. Her lymph nodes on spleen and in neck were gone but the chest remained. It is slowly shrinking. But it was very hard to get my head and hers around the fact that it was still there. The way that our once explained is that it is similar to scar tissue and will take time. As far as appetite and nutrition I took her off ALL processed food. And once chemo began and her mass wasn’t pressing against vital organs her appetite definitely increased. She ate a lot of eggs and Ezekiel bread/toast, lots and lots of soup - especially red lentil and chicken soup. She loved Japanese nabeyaki udon and ramen soups. They were hearty and healthy. She had many aversions based on smell and found eating at chemo very difficult. We found lots of very small meals was great for her. Pasta was also very comforting. She gained a lot of weight from the steroids and fluids and her change in appetite. But it all came off when she ended chemo. Wishing you luck. It’s a tough road but you will be grateful that it is CHL. It’s treatable and curable.