No it was not visible in CT scan. When removing cancerous tumors, a pathologist is there to ensure that enough tissue is removed to get “clear margins” meaning cancer cells are not visible in remaining tissue. They took as much esophagus as they could from my husband but couldn’t get clear margins. He wouldn’t be able to tolerate chemo/radiation again, so immunotherapy is the recommended treatment. This treatment is MUCH LESS impactful than chemo/radiation.