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Gastric cancer is common cancer in the world. Contradictory results regarding FOXP3 expression in gastric carcinoma were detected and the role of Ki-67 in prognosis is not completely understood. Furthermore, due to increasing use of anti-HER2 drug trastuzumab for gastric cancer, assessment of HER2 expression becomes important. This study tried to assess the FOXP3 expression in gastric carcinoma and to study the relation between its expression and Ki-67 and HER2/neu expression and relation between their expression and other clinicopathological variables. This retrospective study was carried out on 60 gastric adenocarcinoma cases. Tissue microarrays and immunohistochemical staining for FOXP3, Ki-67 and HER2/neu were done and then assessed and scored. HER2/neu expression showed significant relation to Lauren histological type and lymph node status. High Ki-67 index was related significantly to patients’ age, lympho-vascular tumor emboli, peri-neural invasion, tumor grade, lymph node status, and cancer stage. There was significant relation between high FOXP3 expression and patients’ age, lympho-vascular tumor emboli, peri-neural invasion, tumor grade, lymph node status, and cancer stage. Direct positive significant relationships between HER2/neu, Ki-67, and FOXP3 expression were noticed. Finally, high FOXP3 expression, positive HER2/neu, and high Ki-67 nuclear proliferation index may be an indication of the aggressiveness of gastric carcinoma.

journal of immunoassay and immunochemistry

Immunohistochemical expression of FOXP3 in gastric carcinoma; its relation to Ki-67 proliferation marker, HER2/neu expression, and other clinicopathological parameters