PMC1181810_01
Abdominal CT scan showing a 3 x 2 cm, well-defined, uniformly enhanced mass adjacent to the duodenal loop.
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F1
Abdominal computed tomography (CT) and magnetic resonance imaging (MRI) scans showed a 3 x 2-cm, clearly defined, well-enhanced mass adjacent to the duodenal loop in the subhepatic space (Figure 1).
The pathologic findings were of a well-encapsulated solid mass containing cells with a diffuse, trabecular growth pattern. (x40, H&E).
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F2
Gastrinoma was finally diagnosed by immunohistochemical staining (Figures 2, 3).
The tumor cells were strongly immunopositive for gastrin. (x250, avidin-biotin-peroxidase).
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F3
Gastrinoma was finally diagnosed by immunohistochemical staining (Figures 2, 3).
Biopsy of the multiple small nodules revealed the haphazard arrangement of uniform spindle cells in a collagenous stroma. (x100, H &E).
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F4
The pathologic diagnosis was gastrointestinal stromal tumor (GIST) with a low mitotic index as evidenced by C-kit positivity (Figures 4, 5).
The tumor cells were immunopositive for C-kit (CD117). (x 100, H &E).
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F5
The pathologic diagnosis was gastrointestinal stromal tumor (GIST) with a low mitotic index as evidenced by C-kit positivity (Figures 4, 5).