Gastrointestinal stromal tumor (GIST)



GROSS DESCRIPTION: The specimen consists of a partial gastrectomy measuring 15 x 101 x 7 cm. Attached to the wall of the stomach is a large cystically dilated mass measuring 21 x 16 x 12 cm. Opening of the mass shows a tumor arising from the wall with a cystic component filled by blood.

SPECIAL STUDIES: The tumor cells are positive for C-kit and CD34, negative for CK, desmin and S-100.

DIAGNOSIS: Epitheloid gastrointestinal stromal tumor.

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