IMO you should go to another place and get an "independent" opinion. Do you have any scans and blood work at this point? It's about the numbers and scan images and as such not being there in person is not an impediment. A virtual visit should do. Be sure that you go to the best quality facility in your country. This is critical.
How was your cancer diagnosed? Did you have an endoscopy with a biopsy to confirm the cancer diagnosis?