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The Korean Journal of Pathology 1996;30(2): 115-120.
Gastric Carcinoma with Lymphoid Stroma: Pathologic and immunohistochemical study of 14 cases.
Eun Hee Lee, Woo Young Jang, Kyoung Chan Choi, Young Ran Shim, Joon Hyuk Choi, Won Hee Choi
Department of Pathology, Yeungnam University College of Medicine, 705-035 Taegu, Korea.
ABSTRACT
A total of 672 surgically resected gastric carcinomas were reviewed, and fourteen cases(2.1%) of "gastric carcinoma with lymphoid stroma" were identified. The tumor was located mostly in cardia and body portion(86%). Thirteen patients one was lost to follow up were alive without recurrence of tumor. Grossly, this carcinoma was characterized by an expanding growth pattern or a multinodular pattern. Histologically, this carcinoma showed an irregular trabecular and alveolar arrangement and densely infiltrated lymphoid cells with lymph follicles. The tumor cell nests were widely separated by non-desmoplastic lymphoid stroma. On immunohistochemical study, T cells were evenly distributed throughout the tumor lesion with intimate contact with individual carcinoma cells, but B cells were mainly present within the germinal centers of lymph follicles. Thus, the organized immune response combined with cell mediated and humoral immunities against the carcinoma cells may be a defense mechanism of the host in this type of gastric carcinoma.
Key Words: Gastric carcinoma; Lymphoid stroma; Pathology; Prognosis