Do doctors put me to sleep for a biopsy of a mass on my pancreas?

It depends to a...: ...great degree on the type of biopsy that's done and to a lesser degree on your level of anxiety. For a fine needle biopsy, you may need only local anesthesia and light sedation. More invasive procedures require heavier sedation or even general anesthesia. In any case, you shouldn't eat anything after midnight the night before and you need to arrange to have someone to take you home afterwards