Pseudomyxoma Peritonei.

Background: Pseudomyxoma peritonei is a rare tumorous disease with various grades of malignancy and is characterized by production of mucinous and gelatinous masses. Development of pseudomyxoma peritonei is usually associated with rupture of appendiceal mucinous tumors and other mucinous tumors of the gastrointestinal tract or ovaries. Pseudomyxoma peritonei is usually divided into three types: low-grade, high-grade, and high-grade with signet ring cells.

Malignant Peritoneal Tumors - Introduction.

This article provides an introduction to peritoneal tumors, which are the subject of a series of review papers published in Issue 5 (2019) of Klinicka onkologie. Many malignant peritoneal tumors are characterized by production of mucinous and gelatinous masses, multiple peritoneal disability, so-called peritoneal carcinomatosis, and various grades of malignancy depending on their origin, staging, and histological type. Malignant peritoneal tumors are rare and their clinical symptomatology is nonspecific and varies according to the extent of disability.