涎腺恶性淋巴上皮病变临床病理特征及其与EB病毒的相关性

Clinical Pathological Characteristics of Malignant Lymphoepithelial Lesion of the Salivary Glands and Its Relationship with EB Virus

目的：了解涎腺恶性淋巴上皮病变的临床病理特征及其与埃泼斯坦－巴尔病毒（ Epstein-Barr Virus,EBV）的关系。方法：采用原位杂交和免疫组化 LSAB法对 41例涎腺恶性淋巴上皮病变（ Malignant lymphoepithelial lesion,MLEL）进行 EBV编码的 RNA（ EBV-encoded Small RNAs,EBERs）、及 EBV潜在膜蛋白（ Latent Membrane Protein,LMP1）、核抗原（ Epstein-Barr Nuclear Antigen-2,EBNA2）和立即早期基因（ Z EBV Replication Activator,ZEBRA）检测。结果：（ 1）本组 41例涎腺 MLEL EBERs 40例阳性，阳性率 97.56％。（ 2） 41例涎腺 MLEL LMP1阳性检出率 75.6％ (31/41)， EBNA2未检出（ 0/20）， ZEBRA仅 1例阳性。结论：本结果表明 EBV与 MLEL存在密切关系，很可能在其发病中起着重要作用。

Objectives： This study was designed to investigate the clinical pathological characteristics of malignant lymphoepithelial lesion(MLEL) of salivary glands and the relationship with EBV（ Epstein-Barr Virus） . Methods： In situ hybridization and immunohistochemical methods were used to detect EBERs (EBV-encoded small RNAs), latent membrane protein 1 (LMP1), EBNA2(EB nuclear antigen-2), and ZEBRA (Z EBV replication activator) in paraffin embedded tissues of 41 MLEL cases. Results： (1)Forty cases of MLEL showed staining with EBERs. Positive rate of EBERs by in situ hybridization in 41 cases of MLEL was 97.56％ . (2)LMP1 expression was detected in 75.6％ (31/41), positive rate of ZEBRA was 2.5％ (1/41), no EBNA2 was found (0/20). Conclusion： EBV might play an important role in pathogenesis of MLEL.