[Peritoneal pseudomyxoma secondary to mucinous cystadenocarcinoma of the appendix]

A new case is presented of peritoneal pseudomyxoma secondary to a mucinous cystadenocarcinoma of the appendix discovered in the course of repair of a strangulated umbilical hernia. This is an uncommon entity which is only exceptionally diagnosed before operation and has a controversial treatment. The evolution and prognosis are unpredictable and are directly related to the degree of cellular differentiation.