PMID- 21855232 OWN - NLM STAT- MEDLINE DCOM- 20120209 LR - 20181201 IS - 1618-0631 (Electronic) IS - 0344-0338 (Linking) VI - 207 IP - 9 DP - 2011 Sep 15 TI - ALK-positive extramedullary plasmacytoma with expression of the CLTC-ALK fusion transcript. PG - 587-91 LID - 10.1016/j.prp.2011.07.001 [doi] AB - Anaplastic lymphoma kinase (ALK)-positive non-Hodgkin lymphoma (NHL) was long thought to be a disease occurring uniquely in T or null-cell lymphomas. More recently, however, a small number of B-lineage lymphomas have been reported to express ALK fusion genes. These tumors often exhibit a plasmablastic morphology, a finding which prompted our interest in looking for ALK fusions in plasma cell neoplasms. We studied 46 cases of extramedullary plasmacytoma by immunostaining with anti-ALK antibody and fluorescence in situ hybridization (FISH) analysis using an ALK break-apart probe and found one case to be ALK protein-positive and demonstrated the disruption of the ALK gene in this case. Immunohistochemistry showed that the tumor cells were strongly positive for CD138, VS38c, and epithelial membrane antigen, but lacked expression of CD20, CD79a, CD45, and CD30. Both RT-PCR and genomic DNA-PCR confirmed the CLTC-ALK fusion. This finding expands the lists of the ALK-positive tumors, and ALK-positive extramedullary plasmacytoma may benefit from the treatment of ALK inhibitor in the future. CI - Copyright (c) 2011 Elsevier GmbH. All rights reserved. FAU - Wang, Wei-ya AU - Wang WY AD - Department of Pathology, West China Hospital of Sichuan University, Chengdu, China. FAU - Gu, Ling AU - Gu L FAU - Liu, Wei-ping AU - Liu WP FAU - Li, Gan-di AU - Li GD FAU - Liu, Hua-jun AU - Liu HJ FAU - Ma, Zhi-gui AU - Ma ZG LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20110819 PL - Germany TA - Pathol Res Pract JT - Pathology, research and practice JID - 7806109 RN - 0 (Biomarkers, Tumor) RN - 0 (DNA, Neoplasm) RN - 0 (Oncogene Proteins, Fusion) RN - 0 (oncoprotein CLTCL-ALK) RN - EC 2.7.10.1 (ALK protein, human) RN - EC 2.7.10.1 (Anaplastic Lymphoma Kinase) RN - EC 2.7.10.1 (Receptor Protein-Tyrosine Kinases) SB - IM MH - Anaplastic Lymphoma Kinase MH - Biomarkers, Tumor/metabolism MH - DNA, Neoplasm/analysis MH - Humans MH - In Situ Hybridization, Fluorescence MH - Magnetic Resonance Imaging MH - Oncogene Proteins, Fusion/*genetics/*metabolism MH - Plasmacytoma/*enzymology/pathology MH - Receptor Protein-Tyrosine Kinases/*genetics/*metabolism MH - Reverse Transcriptase Polymerase Chain Reaction EDAT- 2011/08/23 06:00 MHDA- 2012/02/10 06:00 CRDT- 2011/08/23 06:00 PHST- 2011/02/21 00:00 [received] PHST- 2011/06/19 00:00 [revised] PHST- 2011/07/07 00:00 [accepted] PHST- 2011/08/23 06:00 [entrez] PHST- 2011/08/23 06:00 [pubmed] PHST- 2012/02/10 06:00 [medline] AID - S0344-0338(11)00149-X [pii] AID - 10.1016/j.prp.2011.07.001 [doi] PST - ppublish SO - Pathol Res Pract. 2011 Sep 15;207(9):587-91. doi: 10.1016/j.prp.2011.07.001. Epub 2011 Aug 19.