Here are a few links –
- https://www.cancer.net/cancer-types/esophageal-cancer
- https://www.mayoclinic.org/diseases-conditions/esophageal-cancer/symptoms-causes/syc-20356084
- https://www.webmd.com/cancer/esophageal-cancer
- https://my.clevelandclinic.org/health/diseases/6137-esophageal-cancer
- https://www.healthline.com/health/esophageal-cancer
- https://emedicine.medscape.com/article/277930-overview
