“…Thus, early detection of atrophic gastritis and gastric cancer can be done using multiple markers like HLA-DR, HLA-DQ, age, sex and H pylori infection (17). Other studies done in Iraq showed that there is an association between HLA and different diseases in Iraq (18) like DR3 and DR4 is common in Insulin dependent diabetes mellitus (19,20), Inflammatory bowel disease was associated with DR8 (21). In conclusion, our results, together with other studies , support that genetic constitution through HLA-DR locus determines the mechanism and pathogenesis of disease as well as clinical and pathologic outcomes, triggered by the interaction between environmental factors and genetic factors.…”