[Treatment Strategy for Gastric Carcinoma with Lymphoid Stroma]

Gastric carcinoma with lymphoid stroma (GCLS) is a histological type with severe lymphocytic infiltration. GCLS is very rare and few cases have been reported. We examined the clinical features, problems of preoperative diagnosis, and treatment of 14 cases (1.8%) that were diagnosed as GCLS out of 790 gastric cancers surgically resected in our hospital. The mean age was 69 years. Six, 8, and 0 cases were located in the upper, middle, and lower fields of the stomach, respectively, and 8, 1, 4, and 1 cases were macroscopically 0-Ⅱc, 0-Ⅰ, type 2, and type 3, respectively. The depth of invasion was M, SM1, SM2, MP, and SS in 0, 0, 9, 3, and 2 cases, respectively. There were 12 cases(86%)with infection by Epstein-Barr virus, and just 1 case with lymph node metastasis. All cases have had no evidence of recurrence. There were no cases that were diagnosed as GCLS before surgery. GCLS is recognized as having a more favorable prognosis compared with other types of gastric carcinoma, so an aggressive surgery might achieve good outcomes. However, preoperative diagnosis is very difficult and there is a compelling need for new techniques or criteria for diagnosis of GCLS.