Hi, dear I have gone through your question. I can understand your concern. He may have esophageal cancer or may be some benign lesion. Biopsy give the exact diagnosis and then you should take treatment accordingly. Biopsy is not a cause of cancer spread. It just a diagnostic procedures. Just wait for your biopsy diagnosis and then take treatment accordingly. Hope I have answered your question, if you have doubt then I will be happy to answer. Thanks for using health care magic. Wish you a very good health.