Abstract
Abstract Introduction: Gastric cancer is the second most common GI cancers and third leading cause of cancer-related deaths worldwide. In Ghana, gastric cancer contributes significantly to cancer morbidity and mortality. The recent development on the benefit of targeted therapy in the management of gastric cancer using HER-2 monoclonal antibody in combination with chemotherapy has greatly improved the overall survival of patients. This study therefore aims at determining the frequency of Her-2 over-expression in gastric carcinomas in Kumasi, Ghana and comparing with other prognostic factors. Methodology: Demographic data and histological diagnosis were retrieved from the surgical day book of the Department of Pathology, Komfo Anokye Teaching Hospital, Kumasi. The slides were retrieved and reviewed to confirm diagnosis, grading and classification of gastric cancer. Immunohistochemistry was done with anti-HER-2 antibody to confirm HER-2 over-expression. The data was analysed with SPSS version 17. Results: Of the 99 cases of gastric cancer seen over the 8 year period, there were 57 males and 42 females, adenocarcinoma (91), GIST (5) and Non Hodgskin Lymphoma (3). The age range of the study population was 8-90 years with modal age group in the 6th decade. There were more biopsies (63) than resections (36). Of the adenocarcinomas, 45 were poorly differentiated, 38 moderately differentiated and 8 well differentiated. Diffuse type is most common with 47 cases followed by intestinal 41cases and mixed type 3 cases. Three of the 4 patients under the age of 30 years had lymphoma. HER-2 over-expression was seen in 14 out of the 47 tested and all were intestinal type. Conclusion: HER -2 over-expression was seen a small cohort of our patients with gastric cancer especially those with intestinal type. Citation Format: Babatunde M. Duduyemi, Mary Y. Afihene, Emmanuel A. Asiamah. Human epidermal growth receptor-2 immunohistochemistry in gastric cancer [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2017; 2017 Apr 1-5; Washington, DC. Philadelphia (PA): AACR; Cancer Res 2017;77(13 Suppl):Abstract nr 753. doi:10.1158/1538-7445.AM2017-753
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