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Cystic malignant peritoneal mesothelioma of the abdominal wall. Case report
Abstract:
We present the clinical observation of a female patient with cystic peritoneal malignant mesothelioma developed in the thickness of the abdominal wall. The diagnosis included several steps: tumor classification as mesothelioma, tumor differentiation from reactive mesothelial hyperplasia, establishment of the malignant nature and differentiation from other malignant peritoneal tumors. Relapse in about one year after surgery and about six months after the end of chemotherapy also claim malignancy of the tumor. The particular tumor location in the thickness of the abdominal muscles, seemingly without involvement of the parietal peritoneum, in a patient with a history of caesarean operation, questions its development out of ectopic tissue embedded in scar from previous surgery. KEY WORDS: Abdominal wall, Caesarian operation Cystic malignant peritoneal mesothelioma, CK5/6, p53.
Insights
A rare cystic malignant peritoneal mesothelioma was observed in the abdominal wall. Its unusual location and recurrence suggest development from ectopic tissue in a prior caesarean operation scar.
Area of Science:
- Oncology
- Pathology
- Surgical Oncology
Background:
- Malignant peritoneal mesothelioma is a rare tumor.
- Cystic variants are exceptionally uncommon.
- Development in the abdominal wall musculature is atypical.
Purpose of the Study:
- To report a unique case of cystic malignant peritoneal mesothelioma.
- To detail the diagnostic challenges and considerations.
- To explore potential etiologies, including ectopic tissue in surgical scars.
Main Methods:
- Clinical case presentation.
- Histopathological examination with immunohistochemistry (CK5/6, p53).
- Review of patient history, including prior caesarean operation.
Main Results:
- Diagnosis of cystic malignant peritoneal mesothelioma confirmed.
- Tumor located within the abdominal wall, distinct from parietal peritoneum.
- Evidence of recurrence post-surgery and chemotherapy.
Conclusions:
- The abdominal wall location and recurrence support a malignant diagnosis.
- Ectopic mesothelioma developing in a caesarean scar is a plausible hypothesis.
- This case highlights the importance of considering unusual origins for peritoneal tumors.
