Peritoneal mesothelioma

Guidelines for Pathologic Diagnosis of Malignant Mesothelioma: 2012 Update of the Consensus Statement from the International Mesothelioma Interest Group

“…While epithelioid and sarcomatous types can be seen in PMM, the incidence of biphasic tumors is lower than in pleural disease, and pure sarcomatous tumors are very rare. 51,52 As in pleural MM, the biphasic and sarcomatoid subgroups have a significantly poorer prognosis and are less amenable to treatment overall. 53,54 While definitions of pleural MM have proposed a minimum of 10% spindled growth for a biphasic designation, the less common occurrence of biphasic histologic appearance and the distinctly poorer prognosis of this group in PMM may make a minimum value less practical.…”

Borderline- und maligne mesenchymale Tumoren des Abdomens

“…Ausgehendend vom peritonealen Mesothel können diese zwei unterschiedliche makroskopische Ausprägungen aufweisen [9,20]. Der multinoduläre Typ einerseits zeigt mehrere weichteildichte Tumorknoten, die teilweise konfluierend erscheinen können und eine Größe von sehr klein bis zu mehreren Zentimetern aufweisen.…”

Role of Imaging in Peritoneal Surface Malignancies

“…The epithelioid variety has a much better prognosis as compared to the other varieties and is treated aggressively. The cytological and histologic features of MPM have been described in recent articles [43,44]. The tumor arises from mesothelial cells lining the peritoneal cavity.…”

“…Three broad subtypes of MPM have been described: epithelioid, mixed/biphasic, and sarcomatoid. Epithelioid MPM is by far the most commonly found subtype, diagnosed in approximately 75-92 % of cases; while mixed/biphasic comprises 8-22 % [44][45][46]. Sarcomatoid MPM is very rare.…”