Gastric biopsy: the tumor is present in one of four fragments and extends to the edges of the tissue fragment. immunostain chromogranin is positive in the net. ki-67 shows a proliferation rate of 1-2%. dr said its benign. is this still cancer?

Without looking at the slide directly it is not possible to answer. The judgements are directly related to the experience of the pathologist. If your dr has worked with this team for sometime they will be the best judge of what it shows a d the long term follow up of those like you who have a biopsy like this. You can also ask for a local second opinion.