Given the timeline and events you describe it seems that indeed they are removing a tumor and since you have not had any tissue biopsy or scans, then I am certain that tumor is going to pathology for a biopsy. The results of that procedure will direct the next steps.

There is nothing you can do until the results come back so please try as hard as you can to not let your mind get all twisted up with is it, is it not cancer. You just need to sit still, don't read any random stuff on the Internet unless you must and then make CERTAIN you go to authoritative sites such as this one, American Cancer Society, or many of the pr4ominent medical institutions such as Memorial Sloane Ketteering, MD Anderson, UCSF, UCLA, etc. Do NOT ready any thing else.

Good luck... Now go play golf.

don