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Multicystic peritoneal mesothelioma: a case report
E Alvarez-Fernandez1, A Rabano, J L Barros-Malvar
1Servicio de Anatomia Patologica, Hospital General Gregorio Maranon, Facultad de Medicina, Madrid, Spain.
Abstract:
A case of recurrent cystic peritoneal mesothelioma is reported. Ultrastructurally the tumour cells showed abundant surface microvilli, desmosomes, intracytoplasmic filaments and well-developed basal lamina. The cells demonstrated positive staining for keratin peptides, vimentin and epithelial membrane antigen and, some of them, for carcinoembryonic antigen. No staining was demonstrable for a number of endothelial markers. The findings are in accord with the proposed mesothelial origin of the neoplasm and can be of help in the differential diagnosis of other multicystic neoplasms arising in the peritoneal cavity.
Insights
This case report details recurrent cystic peritoneal mesothelioma. Ultrastructural and immunohistochemical findings support its mesothelial origin, aiding differential diagnosis of peritoneal neoplasms.
Area of Science:
- Oncology
- Pathology
- Cell Biology
Background:
- Recurrent cystic peritoneal mesothelioma is a rare neoplasm.
- Accurate diagnosis is crucial for patient management and differentiating from other peritoneal tumors.
Observation:
- A case of recurrent cystic peritoneal mesothelioma was examined.
- Ultrastructural analysis revealed abundant surface microvilli, desmosomes, intracytoplasmic filaments, and a well-developed basal lamina in tumor cells.
Findings:
- Immunohistochemistry showed positive staining for keratin peptides, vimentin, and epithelial membrane antigen.
- Some cells also stained positive for carcinoembryonic antigen, while endothelial markers were negative.
- These cellular characteristics are consistent with a mesothelial origin.
Implications:
- The findings support the mesothelial origin of this specific neoplasm.
- This case contributes to the differential diagnosis of multicystic peritoneal neoplasms.
- Understanding these features aids in accurate diagnosis and treatment planning for peritoneal mesothelioma.