CACA China Integrated Diagnosis and Treatment Guidelines for Peritoneal Tumors - 2025 Edition

Peritoneal tumors are mainly classified as primary and secondary. Primary tumors originate from the peritoneum; common types include primary peritoneal cancer (Müllerian-type epithelial tumors, mainly serous carcinoma) and malignant peritoneal mesothelioma (MPM). Secondary tumors include various metastatic cancers, peritoneal sarcomatosis (PS), pseudomyxoma peritonei (PMP), and gliomatosis. Clinically, metastatic and epithelial malignant peritoneal tumors are more common, while primary and mesenchymal tumors are relatively rare and considered rare diseases.




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