Conclusion

Oesophagal cancer is usually not diagnosed until you start experiencing symptoms. The cause of the condition is unknown, but it can be related to irritation or Inflammation in the oesophagus.
References
[1] https://www.mayoclinic.org/diseases-conditions/chronic-cough/diagnosis-treatment/drc-20351580
[2] https://my.clevelandclinic.org/health/diseases/3929-anemia
[3] https://www.webmd.com/digestive-disorders/swallowing-problems
[4] https://www.sciencedirect.com/topics/medicine-and-dentistry/odynophagia
[5] https://www.webmd.com/cancer/lymphoma/lymphoma-cancer
[6] https://www.cancer.org/cancer/melanoma-skin-cancer.html











