Esophageal cancer is one of the most common malignant tumors
in the world. China’s esophageal cancer patients account for about
60% of the world’s total, and most of them are in the advanced stage
when diagnosed [1]
https://www.omicsonline.org/open-access-pdfs/monitoring-nonoperative-treatment-for-advanced-esophageal-cancer-by-dynamic-ctcs-count-a-case-report.pdf