MICROSCOPIC DESCRIPTION: Gastrointestinal Stromal Tumor (GIST)
Procedure: Partial small bowel resection.
Tumor Site: Proximal jejunum.
Tumor Size: 3.5 X 3.0 X 2.5 cm.
Tumor Focality: Unifocal.
GIST Subtype: Spindle cell.
Mitotic Rate: 0/50 HPF.
Necrosis: Present; <5%
Histologic Grade: Low grade.
Risk Assessment: Low.
Margins: Free of tumor.
Pathologic Staging: pT2.
Ancillary Studies: KIT (CD117) and CD34 positive; s100, desmin, cytokeratin negative.
Preresection Treatment: None.
FINAL DIAGNOSIS:
Proximal jejunum, partial resection - Gastrointestinal stromal tumor (GIST).