ArticleClinical cancer research : an official journal of the American Association for Cancer Research2026
FET-Rearranged Myoepithelial Tumors Are Clinically Heterogeneous and Epigenetically Distinct from PLAG1-Rearranged Adnexal and Salivary Gland Myoepithelial Tumors.
Article in Clinical cancer research : an official journal of the American Association for Cancer Research, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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Who cites it
1 citing paper in PubMed.
- Two rare cases of FET::CREB epithelioid mesenchymal tumors, displaying atypical immunophenotype (myoepithelial-like), unraveled on next-generation sequencing.Virchows Archiv : an international journal of pathology · 2026Article
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21 authors.
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Abstract
purposeFusion-positive myoepithelial tumors (MET) are clinicopathologically heterogeneous and variably termed mixed tumors and myoepithelial carcinomas. As FET-rearranged METs lack ductal/epithelial differentiation, we test whether FET-rearranged METs are epigenetically distinct from adnexal PLAG1-rearranged METs, which we hypothesize to be analogues of salivary gland METs. EXPERIMENTAL
designDNA methylation profiling from a multi-institutional cohort of 52 fusion-positive skin, soft-tissue, and bone MET cases was performed and compared with diverse tumor types, including salivary METs. The MET subgroups harbored EWSR1::KLF15, EWSR1/FUS::KLF17, EWSR1::PBX1, EWSR1::PBX3, EWSR1/FUS::POU5F1, SS18::POU5F1, EWSR1::ZNF444, and PLAG1 rearrangements. Pooled clinicopathologic and outcome analysis with new and published cases (total 185) was performed.
resultsThe MET subgroups showed significant heterogeneity in age, site, and histology. Specifically, EWSR1::KLF15 METs affected predominantly young children (<5 years); EWSR1::PBX1/PBX3 METs were enriched in skin/bone; and EWSR1/FUS::POU5F1, SS18::POU5F1, and EWSR1::KLF15 METs tended to display malignant histology. Conversely, PLAG1-rearranged tumors were predominantly benign, arising in older adults and located in the skin. DNA methylation profiling revealed that FET-rearranged METs were epigenetically related to SS18::POU5F1 METs and FET::NFATC2 sarcomas but entirely distinct from PLAG1-rearranged adnexal and salivary METs. Histologic features were correlated with the degree of genome-wide copy-number variation. The median disease-specific survival was shortest in SS18::POU5F1 (31 months), EWSR1::PBX3 (38 months), and EWSR1::KLF15 (45 months) METs. On multivariate analysis, age <25 years was a significant predictor of worse progression-free survival.
conclusionsFET-rearranged METs are epigenetically unrelated to cutaneous and salivary gland METs, and their malignant counterparts are best classified as sarcomas rather than carcinomas.
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