Peritoneal cancer is a rare cancer. It develops in a thin layer of tissue that lines the abdomen. It also covers the uterus, bladder, and rectum. Made of epithelial cells, this structure is called ...

Learn more about mesothelioma from the National Cancer Institute. Image of the Peritoneum Peritoneal mesothelioma forms in the thin layer of tissue that lines the inside of the abdomen and covers the ...