A layer of cells that look like normal stomach lining on top of sites of stomach cancer can make it difficult to spot after removal of a Helicobacter pylori infection. In a recent study, researchers from Hiroshima University have uncovered the origin of this layer of cells: it is produced by the cancer tissue itself.
source https://www.lifetechnology.com/blogs/life-technology-news-blog/scientists-discover-origin-of-cell-mask-that-hides-stomach-cancer