Benign peritoneal mesothelioma

Case contributed by Bahman Rasuli
Diagnosis certain


Painless gradual distension of abdomen.

Patient Data

Age: 3 years
Gender: Male

Large well defined hypodense oval cystic lesion with a few internal septations occupied all the space of the abdominopelvic cavity displacing bowel loops superiorly and posteriorly

No solid component.


Macroscopic appearance of abdominal mass after surgical resection.


Benign multicystic mesothelioma.

Case Discussion

Benign peritoneal mesothelioma is an unusual benign tumor with an extremely low potential of malignant transformation that originated from the epithelial and mesenchymal cells of mesothelial tissue.

Gross pathology image courtesy of Dr. Sara Akbarnejad and Dr. Seyede Saeede Hosseini, Payambar Azam Hospital.

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