Hi @gigi65, I have not been a patient of Dr. Yoon's. But I can say that his contribution to research about gastrointestinal cancers is very impressive. Here is a recent article featuring one of his studies.
- Immunotherapy may play role in treating nonmetastatic gastroesophageal cancer https://newsnetwork.mayoclinic.org/discussion/immunotherapy-may-play-role-in-treating-nonmetastatic-gastroesophageal-cancer/

And as Mayo patients, you and your husband know that Dr. Yoon will be working collaboratively with a whole team of Mayo experts focused on your husband care, hope and healing. I'll be thinking of you as you prepare for your visit later this month. Got questions?