- Patient must have histologically proven, pathologically verified and surgically incurable(unresectable, recurrent, or metastatic) gastric/gastroesophageal junction carcinoma. Gastric lymphoma and Gastrointestinal stromal tumor(GIST) are ineligible for this study. At least 6 unstained paraffin-embedded pathologic specimen slides will be required for the COX-2 expression assays.