Benign Multicystic Peritoneal Mesothelioma: A Case Report

Abstract

Benign multicystic peritoneal mesothelioma (BMPM) is a rare tumor originating from peritoneal mesothelial cells. Here, we present a case of an 18-year-old male with right lower abdominal pain. Physical examination revealed a palpable mass with unclear boundaries. Laboratory tests showed elevated levels of monocytes and high-sensitivity C-reactive protein. CT scan revealed a cystic mass in the ileocecal region with multiple septations. Laparoscopic surgery confirmed a cystic solid mass resembling beads on the colon’s right side. Immunohistochemistry confirmed BMPM diagnosis. BMPM, especially in the ileocecal region, is uncommon and presents diagnostic challenges. Differential diagnosis includes lymphangioma, peritoneal metastasis, and malignant mesothelioma. CT findings, such as thin cyst walls and septations, aid in diagnosis. Recognition of BMPM’s imaging features improves diagnostic accuracy. Surgical resection remains the primary treatment. This case underscores the importance of considering BMPM in young male patients with abdominal pain and emphasizes the value of imaging modalities in accurate diagnosis and management.