Gastrointestinal (GI) stromal tumors are mesenchymal tumors that arise from the GI tract. In rare cases, these tumors are found in intra-abdominal sites unrelated to the GI tract and are immunohistochemically similar to their GI tract counterparts. Primary pancreatic GI stromal tumors are very rare, with only 4 previous cases reported.
A sagittal, lateral magnetic resonance image of the abdomen obtained with a 1.5-T magnetic resonance image showing a 6-cm mass in the left upper quadrant with heterogeneous signal characteristics. The arrow shows the tumor and its proximity to the posterior aspect of the stomach (S) and to the spleen (Sp).
Immunohistochemical analysis results show that the tumor cells are strongly positive for CD117
(c-Kit) (original magnification ×200).
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