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A novel WWTR1‐CAMTA1 gene fusion is a consistent abnormality in epithelioid hemangioendothelioma of different anatomic sites
Open accessAbstract
The classification of epithelioid vascular tumors remains challenging, as there is considerable morphological overlap between tumor subtypes, across the spectrum from benign to malignant categories. A t(1;3)(p36.3;q25) translocation was reported in two cases of epithelioid hemangioendothelioma (EHE), however, no follow‐up studies have been performed to identify the gene fusion or to assess its prevalence in a larger cohort of patients. We undertook a systematic molecular analysis of 17 EHE, characterized by classic morphological and immunophenotypic features, from various anatomical locations and with different malignant potential. For comparison, we analyzed 13 epithelioid hemangiomas, five epithelioid angiosarcomas, and four epithelioid sarcoma‐like EHE. A fluorescence in situ hybridization (FISH) positional cloning strategy, spanning the cytogenetically defined regions on chromosomes 1p36.3 and 3q25, confirmed rearrangements in two candidate genes from these loci in all EHE cases tested. None of the other benign or malignant epithelioid vascular tumors examined demonstrated these abnormalities. Subsequent reverse transcription‐polymerase chain reaction (RT‐PCR) confirmed in three EHE the WWTR1‐CAMTA1 fusion product. CAMTA1 and WWTR1 have been previously shown to play important roles in oncogenesis. Our results demonstrate the presence of a WWTR1‐CAMTA1 fusion in all EHE tested from bone, soft tissue, and visceral location (liver, lung) in keeping with a unique and specific pathological entity. Thus, FISH or RT‐PCR analysis for the presence of WWTR1‐CAMTA1 fusion may serve as a useful molecular diagnostic tool in challenging diagnoses. © 2011 Wiley‐Liss, Inc.
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Metadata
- Authors
- Errani, C., Zhang, L., Sung, Y. S., Hajdu, M., Singer, S., Maki, R. G., Healey, J. H., & Antonescu, C. R.
- Venue
- Genes, Chromosomes and Cancer
- Publisher
- Wiley
- Published
- 2011-05-16
- Volume
- 50
- Issue
- 8
- Pages
- 644-653
- ISSN
- 1045-2257 (ISSN-L)
- 1098-2264
- OpenAlex
- W2021542512
- Cited by
- 553
- References
- 31
- FWCI
- 12.82
- Type
- journal article
- Language
- en
- Open access
- green
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- Errani, C., Zhang, L., Sung, Y. S., Hajdu, M., Singer, S., Maki, R. G., Healey, J. H., & Antonescu, C. R. (2011). A novel WWTR1‐CAMTA1 gene fusion is a consistent abnormality in epithelioid hemangioendothelioma of different anatomic sites. Genes, Chromosomes and Cancer. https://doi.org/10.1002/gcc.20886
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