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Arch Surg. 2007;142(4):402.

	Since this article does not have an abstract, we have provided the first 150 words of the full text and any section headings.

Answer: Cystic Mesothelioma

The patient was taken to the operating room for an explorative laparoscopy. A 6-cm–diameter pedunculated mass of the greater curvature/anterior wall of the stomach was identified. The mass was removed through a small laparotomy incision (Figure 2); the patient experienced an uneventful recovery and was discharged on the third postoperative day. The gross pathology revealed a gray-brown encapsulated mass. Histopathologic examination revealed a partially cystic, highly vascular, well-encapsuled neoplasm. Immunohistochemistry showed positive staining of tumor cells for cytokeratin and calretinin. A follow-up computed tomographic scan of the abdomen revealed no recurrence at 9 months postoperatively.

Figure appears in full text version. Figure 2. Intraoperative finding.

Benign multicystic peritoneal mesothelioma is an extremely rare neoplasm originating from the visceral and parietal peritoneum of the abdominal cavity. Fewer than 150 cases have been reported in the literature so far.¹ It was first described back in the late 1920s by Plaut,² but the mesothelial origin of this . . . [Full Text of this Article]

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