I have been diagnosed with something called Pseudomyxoma Peritonei, they also call it PMP. What is it?

PMP are the initials for a syndrome called Pseudomyxoma Peritonei.  This syndrome is caused by tumors that spread into the abdomen and that produce large amounts of mucous.  There are low-grade and high-grade tumors that can cause this condition, though more recently the term Pseudomyxoma Peritonei is starting to be used only for the syndrome when it is caused by the lower-grade, or the more benign type, of tumor. More information about these types of tumors can be found at: Mucinous Adenocarcinoma and Pseudomyxoma peritonei (PMP).