ZC3H7B-BCOR high-grade endometrial stromal sarcomas: a report of 17 cases of a newly defined entity

High-grade endometrial stromal sarcoma likely encompasses underrecognized tumors harboring genetic abnormalities besides YWHAE–NUTM2 fusion. Triggered by three initial endometrial stromal sarcomas with ZC3H7B–BCOR fusion characterized by high-grade morphology and aggressive clinical behavior, we her...

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Veröffentlicht in:Modern pathology 2018-04, Vol.31 (4), p.674-684
Hauptverfasser: Lewis, Natasha, Soslow, Robert A, Delair, Deborah F, Park, Kay J, Murali, Rajmohan, Hollmann, Travis J, Davidson, Ben, Micci, Francesca, Panagopoulos, Ioannis, Hoang, Lien N, Arias-Stella, Javier A, Oliva, Esther, Young, Robert H, Hensley, Martee L, Leitao, Mario M, Hameed, Meera, Benayed, Ryma, Ladanyi, Marc, Frosina, Denise, Jungbluth, Achim A, Antonescu, Cristina R, Chiang, Sarah
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container_end_page 684
container_issue 4
container_start_page 674
container_title Modern pathology
container_volume 31
creator Lewis, Natasha
Soslow, Robert A
Delair, Deborah F
Park, Kay J
Murali, Rajmohan
Hollmann, Travis J
Davidson, Ben
Micci, Francesca
Panagopoulos, Ioannis
Hoang, Lien N
Arias-Stella, Javier A
Oliva, Esther
Young, Robert H
Hensley, Martee L
Leitao, Mario M
Hameed, Meera
Benayed, Ryma
Ladanyi, Marc
Frosina, Denise
Jungbluth, Achim A
Antonescu, Cristina R
Chiang, Sarah
description High-grade endometrial stromal sarcoma likely encompasses underrecognized tumors harboring genetic abnormalities besides YWHAE–NUTM2 fusion. Triggered by three initial endometrial stromal sarcomas with ZC3H7B–BCOR fusion characterized by high-grade morphology and aggressive clinical behavior, we herein investigate the clinicopathologic features of this genetic subset by expanding the analysis to 17 such tumors. All of them occurred in adult women with a median age of 54 (range, 28–71) years. They were predominantly based in the endomyometrium and demonstrated tongue-like and/or pushing myometrial invasion. Most were uniformly cellular and displayed haphazard fascicles of spindle cells with mild to moderate nuclear atypia. Myxoid matrix was seen in 14 of 17 (82%) tumors, and collagen plaques were seen in 8 (47%). The mitotic index was ≥10 mitotic figures/10 high-power fields (HPFs) in 14 of 17 (82%) tumors with a median of 14.5 mitotic figures/10 HPFs. No foci of conventional or variant low-grade endometrial stromal sarcoma were seen. All tumors expressed CD10 with only limited or absent desmin, SMA and/or h-caldesmon staining. ER and PR expression in >5% of cells was seen in 4 of 12 (33%) tumors. Diffuse cyclin D1 and BCOR immunoreactivity was present in 7 of 8 (88%) and 7 of 14 (50%) tumors, respectively. Fluorescence in situ hybridization or targeted RNA sequencing confirmed ZC3H7B–BCOR fusion in all tumors, including four and two previously diagnosed as myxoid leiomyosarcoma and undifferentiated uterine sarcoma, respectively. Limited clinical data suggest that patients present at higher stage and have worse prognosis compared with published outcomes in low-grade endometrial stromal sarcoma. Tumors with ZC3H7B–BCOR fusion constitute a distinct group of endometrial stromal sarcomas with high-grade morphology that should be distinguished from other uterine mesenchymal neoplasms that may demonstrate myxoid morphology.
doi_str_mv 10.1038/modpathol.2017.162
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Triggered by three initial endometrial stromal sarcomas with ZC3H7B–BCOR fusion characterized by high-grade morphology and aggressive clinical behavior, we herein investigate the clinicopathologic features of this genetic subset by expanding the analysis to 17 such tumors. All of them occurred in adult women with a median age of 54 (range, 28–71) years. They were predominantly based in the endomyometrium and demonstrated tongue-like and/or pushing myometrial invasion. Most were uniformly cellular and displayed haphazard fascicles of spindle cells with mild to moderate nuclear atypia. Myxoid matrix was seen in 14 of 17 (82%) tumors, and collagen plaques were seen in 8 (47%). The mitotic index was ≥10 mitotic figures/10 high-power fields (HPFs) in 14 of 17 (82%) tumors with a median of 14.5 mitotic figures/10 HPFs. No foci of conventional or variant low-grade endometrial stromal sarcoma were seen. 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Triggered by three initial endometrial stromal sarcomas with ZC3H7B–BCOR fusion characterized by high-grade morphology and aggressive clinical behavior, we herein investigate the clinicopathologic features of this genetic subset by expanding the analysis to 17 such tumors. All of them occurred in adult women with a median age of 54 (range, 28–71) years. They were predominantly based in the endomyometrium and demonstrated tongue-like and/or pushing myometrial invasion. Most were uniformly cellular and displayed haphazard fascicles of spindle cells with mild to moderate nuclear atypia. Myxoid matrix was seen in 14 of 17 (82%) tumors, and collagen plaques were seen in 8 (47%). The mitotic index was ≥10 mitotic figures/10 high-power fields (HPFs) in 14 of 17 (82%) tumors with a median of 14.5 mitotic figures/10 HPFs. No foci of conventional or variant low-grade endometrial stromal sarcoma were seen. 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Triggered by three initial endometrial stromal sarcomas with ZC3H7B–BCOR fusion characterized by high-grade morphology and aggressive clinical behavior, we herein investigate the clinicopathologic features of this genetic subset by expanding the analysis to 17 such tumors. All of them occurred in adult women with a median age of 54 (range, 28–71) years. They were predominantly based in the endomyometrium and demonstrated tongue-like and/or pushing myometrial invasion. Most were uniformly cellular and displayed haphazard fascicles of spindle cells with mild to moderate nuclear atypia. Myxoid matrix was seen in 14 of 17 (82%) tumors, and collagen plaques were seen in 8 (47%). The mitotic index was ≥10 mitotic figures/10 high-power fields (HPFs) in 14 of 17 (82%) tumors with a median of 14.5 mitotic figures/10 HPFs. No foci of conventional or variant low-grade endometrial stromal sarcoma were seen. All tumors expressed CD10 with only limited or absent desmin, SMA and/or h-caldesmon staining. ER and PR expression in &gt;5% of cells was seen in 4 of 12 (33%) tumors. Diffuse cyclin D1 and BCOR immunoreactivity was present in 7 of 8 (88%) and 7 of 14 (50%) tumors, respectively. Fluorescence in situ hybridization or targeted RNA sequencing confirmed ZC3H7B–BCOR fusion in all tumors, including four and two previously diagnosed as myxoid leiomyosarcoma and undifferentiated uterine sarcoma, respectively. Limited clinical data suggest that patients present at higher stage and have worse prognosis compared with published outcomes in low-grade endometrial stromal sarcoma. Tumors with ZC3H7B–BCOR fusion constitute a distinct group of endometrial stromal sarcomas with high-grade morphology that should be distinguished from other uterine mesenchymal neoplasms that may demonstrate myxoid morphology.</abstract><cop>New York</cop><pub>Nature Publishing Group US</pub><pmid>29192652</pmid><doi>10.1038/modpathol.2017.162</doi><tpages>11</tpages><oa>free_for_read</oa></addata></record>
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ispartof Modern pathology, 2018-04, Vol.31 (4), p.674-684
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language eng
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subjects 631/67/1517/1931
692/699/67/1517/1931
Adult
Aged
Collagen
Cyclin D1
Desmin
Endometrial Neoplasms - genetics
Endometrial Neoplasms - pathology
Endometrium
Female
Fluorescence in situ hybridization
Genetic analysis
Humans
Immunoreactivity
Laboratory Medicine
Medicine
Medicine & Public Health
Mesenchyme
Middle Aged
Morphology
Myometrium
Oncogene Proteins, Fusion - genetics
original-article
Pathology
Plaques
Proto-Oncogene Proteins - genetics
Repressor Proteins - genetics
Ribonucleic acid
RNA
RNA-Binding Proteins - genetics
Sarcoma
Sarcoma, Endometrial Stromal - genetics
Sarcoma, Endometrial Stromal - pathology
Tongue
Tumors
Uterus
title ZC3H7B-BCOR high-grade endometrial stromal sarcomas: a report of 17 cases of a newly defined entity
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