Secondary CD5+Diffuse Large B-Cell Lymphoma Not Associated With Transformation of Chronic Lymphocytic Leukemia/Small Lymphocytic Lymphoma (Richter Syndrome)

被引:13
作者
Maeshima, Akiko Miyagi [1 ]
Taniguchi, Hirokazu
Nomoto, Junko [2 ]
Maruyama, Dai [2 ]
Kim, Sung-Won [2 ]
Watanabe, Takashi [2 ]
Kobayashi, Yukio [2 ]
Tobinai, Kensei [2 ]
Matsuno, Yoshihiro [3 ]
机构
[1] Natl Canc Ctr, Clin Lab Div, Chuo Ku, Tokyo 1040045, Japan
[2] Natl Canc Ctr, Hematol & Stem Cell Transplantat Div, Tokyo 1040045, Japan
[3] Hokkaido Univ Hosp, Dept Surg Pathol, Sapporo, Hokkaido 060, Japan
关键词
CD5; Diffuse large B-cell lymphoma; Secondary disease; Immunohistochemistry; Non-Richter syndrome; FOLLICULAR LYMPHOMA; CD5+;
D O I
10.1309/AJCP58FETFGLCKKW
中图分类号
R36 [病理学];
学科分类号
100104 ;
摘要
Few cases of secondary CD5+ diffuse large B-cell lymphoma (DLBCL) that are not Richter syndrome have been reported previously. We report 9 cases of non-Richter syndrome secondary CD5+ DLBCL. Among 529 cases of DLBCL, 38 (7.2%) were CD5+ DLBCL, including 9 of secondary CD5+ DLBCL. Five cases gained CD5 expression during the clinical course of DLBCL (group 1). Three cases showed transformation from CD5-low-grade B-cell lymphoma to CD5+ DLBCL (group 2). The remaining case showed coexistence of CD5+ DLBCL and CD5+ follicular lymphoma. The clonal relationships of CD5- and CD5+ tumors were confirmed in all 4 available cases. Cases of secondary CD5+ DLBCL that were not Richter syndrome were classifiable into 3 groups. Groups I and 2 showed the gain of CD5 during the clinical course or transformation of the tumors, suggesting that CD5 expression is closely associated with the progression of B-cell lymphoma.
引用
收藏
页码:339 / 346
页数:8
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