PMC4460232_01
Abdominal ultrasonography showing a huge heterogeneous mass.
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Dilatation of intrahepatic bile ducts and proximal common bile duct was also referred to (Figure 1).
Abdominal CT reveals a voluminous lesion in pancreatic head and body (arrow).
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A significant ectasia of the intrahepatic and extrahepatic bile ducts could also be seen (Figure 2).
Surgical specimen.
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The gross appearance of the lesion was a solid cystic mass, was encapsulated and multiloculated, and was with necrotic aspect areas, measuring a total of 11.5 cm along its longest axis (Figure 3).
Small round cells with scant cytoplasm; immunohistochemistry was positive for CD99.
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Immunohistochemistry was strongly positive for CD99 (Figure 4), vimentin, automated CKM (creatine kinase, muscle), and CD56.