Abstract
A malignant mesothelioma (MM) is an aggressive neoplasm, although some patients have shown long-term survival, and factors related to survival remain uncertain. We present three cases of MM of the peritoneum including autopsy results, in which factors related to long-term survival were investigated. Case 1 was a 69-year-old man who died 6 years after the initial diagnosis. In case 2, a 67-year-old woman came to us with abdominal distention and, despite chemotherapy, died 9 months after the initial diagnosis. The patient in case 3 was a 68-year-old man who also had abdominal distention and died 9 months after the initial diagnosis. We studied the clinicopathological appearance and performed immunohistochemical staining including Ki-67 labeling index (Ki-67 LI) in primary and metastatic sites of these cases. The histological findings of case 1 indicated epithelioid type; case 2 and 3 were of biphasic type. Immunohistochemical results were consistent with MM. The Ki-67 LI value for both primary and metastatic sites of case 1 was significantly lower than those in cases 2 and 3. We consider Ki-67 LI to be a useful prognostic indicator for MM of the peritoneum.
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Hirano, H., Fujisawa, T., Maekawa, K. et al. Malignant mesothelioma of the peritoneum: case reports and immunohistochemical findings including Ki-67 expression. Med Mol Morphol 43, 53–59 (2010). https://doi.org/10.1007/s00795-009-0460-0
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DOI: https://doi.org/10.1007/s00795-009-0460-0