Is it possible to have esophageal cancer 8 months after a egd that showed only mild chronic esophagitis cause by reflux?

It is possible: This is possible. Consult your doctor for further advice.

Possible, unlikely: The cancer type of the esophagus that occurs with reflux is adenocarcinoma. Esophageal adenocarinoma usually in a setting of gerd and barrets esophagus, age 60's, m>f. If your prior endoscopy did not show barrets or dysplasia 8 months ago, it is unlikely. However, best to have further evaluation from your gastroenterologist. Best wishes.

Yes: Yes, it is possible. However, i encourage you to speak with your family physician and the gastroenterologist and discuss your concerns and/or symptoms.