@littlek,
Hi K:
In 2006 my sister-in-law was diagnosed with NHL, spread through the lymphatic system, and the PET image had her lit up like a Christmas tree. She had chemo which chased it into remission, and has followup Retuxin therapy which is keeping her clean.
She's back to doing her triathelons. Yes, much to give thanks for.
And best to your cuz.