PMID- 23486000 OWN - NLM STAT- MEDLINE DCOM- 20130912 LR - 20151119 IS - 1423-0240 (Electronic) IS - 0378-584X (Linking) VI - 36 IP - 3 DP - 2013 TI - Sudden extramedullary blast crisis of chronic myeloid leukemia manifesting as T-cell lymphoblastic lymphoma. PG - 119-22 LID - 10.1159/000348681 [doi] AB - BACKGROUND: Chronic myeloid leukemia (CML) is usually diagnosed in the chronic phase. An extramedullary blast crisis mimicking a T-cell lymphoma is a rare finding. CASE REPORT: A 35-year-old man presented with multiple lymphadenopathy 2 months after diagnosis of Philadelphia chromosome (Ph)-positive CML in the chronic phase. Cervical lymph node biopsy later indicated an extramedullary blast crisis resembling T-cell lymphoblastic lymphoma (TLBL). The tumor mass was composed of primitive lymphoid cells expressing terminal deoxynucleotidyl transferase (TdT), CD3, CD43, CD5, CD99, and Bcl-2. Although the pathological diagnosis, confirmed by 2 independent pathological centers, was more typical of TLBL, fluorescence in situ hybridization (FISH) analysis showed the bcr-abl fusion gene within the blastic tumor cells. The FISH finding confirmed that the mass represented an extramedullary, immature blastic transformation of CML rather than a de novo T-cell lymphoma. CONCLUSION: The diagnosis of de novo TLBL should be suspected before excluding the extramedullary blast phase of CML. CI - Copyright (c) 2013 S. Karger AG, Basel. FAU - Wei, Jia AU - Wei J AD - Department of Hematology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China. FAU - Huang, Mei AU - Huang M FAU - Wang, Ying AU - Wang Y FAU - Zhou, Jianfeng AU - Zhou J LA - eng PT - Case Reports PT - Journal Article DEP - 20130225 PL - Switzerland TA - Onkologie JT - Onkologie JID - 7808556 RN - 0 (Biomarkers, Tumor) RN - EC 2.7.10.2 (Fusion Proteins, bcr-abl) SB - IM MH - Adult MH - Biomarkers, Tumor/*genetics MH - Blast Crisis/*diagnosis/*genetics MH - Diagnosis, Differential MH - False Positive Reactions MH - Fusion Proteins, bcr-abl/*genetics MH - Genetic Testing/*methods MH - Humans MH - Lymphoma, T-Cell/*diagnosis/*genetics MH - Male EDAT- 2013/03/15 06:00 MHDA- 2013/09/13 06:00 CRDT- 2013/03/15 06:00 PHST- 2013/03/15 06:00 [entrez] PHST- 2013/03/15 06:00 [pubmed] PHST- 2013/09/13 06:00 [medline] AID - 000348681 [pii] AID - 10.1159/000348681 [doi] PST - ppublish SO - Onkologie. 2013;36(3):119-22. doi: 10.1159/000348681. Epub 2013 Feb 25.