PMID- 18272816 OWN - NLM STAT- MEDLINE DCOM- 20080715 LR - 20220310 IS - 1528-0020 (Electronic) IS - 0006-4971 (Print) IS - 0006-4971 (Linking) VI - 111 IP - 12 DP - 2008 Jun 15 TI - Clonally related follicular lymphomas and histiocytic/dendritic cell sarcomas: evidence for transdifferentiation of the follicular lymphoma clone. PG - 5433-9 LID - 10.1182/blood-2007-11-124792 [doi] AB - Rare cases of histiocytic and dendritic cell (H/DC) neoplasms have been reported in patients with follicular lymphoma (FL), but the biologic relationship between the 2 neoplasms is unknown. We studied 8 patients with both FL and H/DC neoplasms using immunohistochemistry, fluorescence in situ hybridization (FISH) for t(14;18), and polymerase chain reaction (PCR)/sequencing of BCL2 and IGH rearrangements. There were 5 men and 3 women (median age, 59 years). All cases of FL were positive for t(14;18). The H/DC tumors included 7 histiocytic sarcomas, 5 of which showed evidence of dendritic differentiation, and 1 interdigitating cell sarcoma. Five H/DC tumors were metachronous, following FL by 2 months to 12 years; tumors were synchronous in 3. All 8 H/DC tumors showed presence of the t(14;18) either by FISH, or in 2 cases by PCR with the major breakpoint region (MBR) probe. PCR and sequencing identified identical IGH gene rearrangements or BCL2 gene breakpoints in all patients tested. All H/DC tumors lacked PAX5, and up-regulation of CEBPbeta and PU.1 was seen in all cases tested. These results provide evidence for a common clonal origin of FL and H/DC neoplasms when occurring in the same patient, and suggest that lineage plasticity may occur in mature lymphoid neoplasms. FAU - Feldman, Andrew L AU - Feldman AL AD - Laboratory of Pathology, National Cancer Institute, Bethesda, MD 20892-1500, USA. FAU - Arber, Daniel A AU - Arber DA FAU - Pittaluga, Stefania AU - Pittaluga S FAU - Martinez, Antonio AU - Martinez A FAU - Burke, Jerome S AU - Burke JS FAU - Raffeld, Mark AU - Raffeld M FAU - Camos, Mireia AU - Camos M FAU - Warnke, Roger AU - Warnke R FAU - Jaffe, Elaine S AU - Jaffe ES LA - eng PT - Journal Article PT - Research Support, N.I.H., Extramural DEP - 20080213 PL - United States TA - Blood JT - Blood JID - 7603509 SB - IM CIN - Blood. 2008 Jun 15;111(12):5418-9. PMID: 18544687 MH - Adult MH - Aged MH - Cell Differentiation MH - Cell Lineage MH - Cell Transdifferentiation MH - Dendritic Cell Sarcoma, Follicular/*genetics/*pathology MH - Dendritic Cells, Follicular/pathology/physiology MH - Female MH - Gene Expression Regulation, Neoplastic MH - Gene Rearrangement MH - Histiocytic Sarcoma/*genetics/*pathology MH - Humans MH - Immunohistochemistry MH - Immunophenotyping MH - In Situ Hybridization, Fluorescence MH - Lymphoma, Follicular/*genetics/*pathology MH - Male MH - Middle Aged MH - Neoplasms, Second Primary/genetics/pathology MH - Polymerase Chain Reaction PMC - PMC2424145 EDAT- 2008/02/15 09:00 MHDA- 2008/07/17 09:00 PMCR- 2009/06/15 CRDT- 2008/02/15 09:00 PHST- 2008/02/15 09:00 [pubmed] PHST- 2008/07/17 09:00 [medline] PHST- 2008/02/15 09:00 [entrez] PHST- 2009/06/15 00:00 [pmc-release] AID - S0006-4971(20)47076-4 [pii] AID - 2007/124792 [pii] AID - 10.1182/blood-2007-11-124792 [doi] PST - ppublish SO - Blood. 2008 Jun 15;111(12):5433-9. doi: 10.1182/blood-2007-11-124792. Epub 2008 Feb 13.