免疫组织化学技术检测Kikuchi淋巴结炎

目的探讨免疫组化在检测Kikuchi 淋巴结炎(KFD)中的意义。方法采用单克隆抗体CD20、CD45RO、CD57、CD68、CD8和多克隆抗体髓过氧化物酶(MPO)对42例KFD活检标本进行HE染色及免疫组化检测。结果淋巴结受损区域由组织细胞、免疫母细胞、浆样单核细胞、小淋巴细胞及核碎片组成。所有病例均出现组织细胞,绝大多数组织细胞共同表达MPO/CD68。免疫母细胞、浆样单核细胞在增生期容易观察到。T细胞呈灶状阳性, 而NK及B细胞呈散在阳性。所有病例中性粒细胞很少或缺乏。结论免疫组化分析可以作为鉴别诊断KFD的重要指标。

Immunohistochemical detection of Kikuchi's lymphadenitis

Objective To evaluate significance of immunohistochemistry in Kikuchi's lymphadenitis (KFD). Methods Biospy specimens were obtained from 42 KFD cases for microscopic examination after the sections were stained with haematoxylin and eosin, and the immunohistochemical features were analyzed by monoclonal antibodies (CD20, CD8, CD45RO, CD57, CD68) and polyclonal antibody (myeloperoxidase, MPO). Results Morphologically, the lymph node lesions comprised vari-ous histiocytes, plasmacytoid monocytes, immunoblasts, small lymphocytes and nuclear fragments. In all the cases, the histio-cytes were invariably observed and most of them were positive for CD68 and MPO. Immunblasts and plasmacytoid mono-cytes were easily observed in proliferative stage. Immunohistochemical examination revealed strong focal T-cell positivity for the antibodies but with scarce B cell (CD20) and NK cell (CD57) positivity in the lesion area, where few or virtually no neu-trophils were seen. Conclusion Immunohistochemical analysis can be crucial for the differential diagnosis of KFD.