PMC3981227_01
Computed tomography scan abdomen and pelvis showing recurrent benign multicystic peritoneal mesothelioma as paracolonic mass.
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Computed tomography scan abdomen and pelvis (Figure 1) showed a 25x10x6.5 cm sized well defined non enhancing lobulated multiloculated cystic lesion in right paracolic gutter on lateral aspect of ascending colon.
The specimen of benign multicystic peritoneal mesothelioma.
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The specimen was a multicystic mass that was 22 cm wide in its greatest dimension (Figure 2).
Microscopic view showing multicystic nature of the tumor lined by mesothelial cells (hematoxylin and eosin stain 200x).
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Histopathology showed cystic spaces lined by flattened cuboidal to hobnail epithelium separated by thin fibrous septa (Figure 3) .The lining epithelium showed strong immunopositivity for calretinin (Figure 4) and immunonegativity for CD31.
Immunohistochemistry showing Calretinin positive (400x).
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Histopathology showed cystic spaces lined by flattened cuboidal to hobnail epithelium separated by thin fibrous septa (Figure 3) .The lining epithelium showed strong immunopositivity for calretinin (Figure 4) and immunonegativity for CD31.