Abstract:
BACKGROUND:Gastric carcinoma with lymphoid stroma (GCLS) has been reported to have a more favorable prognosis than ordinary gastric carcinoma, however, the precise mechanism of the pathogenesis for GCLS remains unclear. METHODS:The authors analyzed 99 GCLS in 94 patients for Epstein-Barr virus (EBV) sequences using polymerase chain reaction (PCR) and in situ hybridization (ISH); these were compared with 42 ordinary gastric carcinomas. RESULTS:Two series of PCR showed 81 (82%) and 46 (47%) of the 99 GCLS to have EBV sequences, which were significantly higher compared with ordinary gastric carcinoma (50% and 9.5%, respectively). With ISH using thymine-thymine dimerized oligonucleotide probes corresponding to EBV-encoded small RNA 1 (EBER1), 82 (83%) of 99 GCLS showed clear, intense hybridization signals localized over the nuclei of the tumor cells, in contrast to only 4 (9.5%) of 42 ordinary carcinomas (P < 0.001). A comparative morphologic analysis of EBER1-positive and negative GCLS revealed that typical features of GCLS, such as mild cellular pleomorphism, rare mitoses, a marked degree of lymphoid stroma, and mild fibrosis, together with a lymphoid infiltration within the cancer cell nests were significantly more frequent in EBER1-positive GCLS. CONCLUSIONS:More than 80% of GCLS were associated with EBV. The presence of EBV association in GCLS was characterized by the above morphologic features.
journal_name
Cancerjournal_title
Cancerauthors
Nakamura S,Ueki T,Yao T,Ueyama T,Tsuneyoshi Mdoi
10.1002/1097-0142(19940501)73:9<2239::aid-cncr2820subject
Has Abstractpub_date
1994-05-01 00:00:00pages
2239-49issue
9eissn
0008-543Xissn
1097-0142journal_volume
73pub_type
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