To add to my brother's comments, I recommend you get the 500 mL glass "beaker" that is sold with the Longevity machine. This produces fine bubbles appropriate for ozonating water on the highest gamma setting.
If it is, in fact, cancer of the esophagus, drinking lots of ozonated water will obviously benefit you. I have heard stories of tumors disappearing entirely and bone metastases clearing up just with ozonated water, and while I would not rely on it exclusively, direct contact with the throat will help much in this case.
Also, cupping on the location of the tumor for 20-30 minutes at a time will allow the tissue to absorb ozone directly. Again, I would not rely on this exclusively, but it will help as a supplement to rectal insufflation.