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 ORIGINAL ARTICLE
Year : 2019  |  Volume : 56  |  Issue : 4  |  Page : 335-340

Utility of YWHAE fluorescent in-situ hybridisation in mesenchymal tumors of uterus- An initial experience from tertiary oncology centre in India


1 Department of Pathology, Tata Memorial Centre, Homi Bhabha National Institute, Mumbai, Maharashtra, India
2 Department of Surgical Oncology, Tata Memorial Centre, Homi Bhabha National Institute, Mumbai, Maharashtra, India
3 Department of Medical Oncology, Tata Memorial Centre, Homi Bhabha National Institute, Mumbai, Maharashtra, India

Correspondence Address:
Santosh Menon
Department of Pathology, Tata Memorial Centre, Homi Bhabha National Institute, Mumbai, Maharashtra
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/ijc.IJC_722_18

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Background: Endometrial stromal sarcoma (ESS) is a common uterine mesenchymal malignancy. According to World Health Organisation (WHO) 2014 classification, ESSs are further subdivided into low-grade ESS (LGESS) and high-grade ESS (HGESS). HGESS is defined by the presence of YWHAE gene rearrangement and has a poorer prognosis compared to LGESS. METHODS: Twenty-four cases comprising of 16 endometrial stromal sarcoma and 8 lesions mimicking ESS were retrieved from the archives of the Department of Pathology and subjected to fluorescent in situ hybridization (FISH) analysis for YWHAE gene rearrangement. Immunohistochemistry for CD10, ER, PR, Cyclin D1, SMA, H-Caldesmon, Desmin, Ki-67, and Pan Cytokeratin was performed. RESULTS: Two cases with histological features similar to HGESS were positive for YWHAE gene rearrangement while 1 was indeterminate. No cases of LGESS and histological mimics of ESS were positive for this rearrangement. CONCLUSIONS: HGESSs are defined by the presence of YWHAE rearrangement. These tumors present at higher stage and have poorer prognosis. They may not respond to hormonal therapy and may be treated with chemotherapy. Cyclin D1 though not specific remains a sensitive tool to triage endometrial stromal sarcomas for this FISH study.






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