From morphology to methylome: epigenetic studies of Müllerian mesonephric‐like adenocarcinoma reveal similarities to cervical mesonephric adenocarcinoma†

Lawrence Hsu Lin, Brooke E. Howitt, David L. Kolin
In: The Journal of Pathology · 2024 · vol. 263(2) , pp. 135–138 · doi:10.1002/path.6285 · PMID:38593211 · W4394622697
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Epigenetic analysis of Müllerian mesonephric-like adenocarcinomas demonstrates their similarity to cervical mesonephric adenocarcinomas, supporting a renaming to mesonephric-type adenocarcinoma.

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Abstract

Mesonephric adenocarcinomas (MAs) and mesonephric-like adenocarcinomas (MLAs) are rare, aggressive neoplasms that arise in the gynecologic tract and show overlapping morphologic, immunohistochemical, and molecular features. While MAs occur in the cervix and are thought to arise from mesonephric remnants, MLAs occur in the endometrium and ovary and are believed to originate from transdifferentiation of Müllerian lesions. Both MAs and MLAs show a variety of architectural patterns, exhibit frequent expression of GATA3 by immunohistochemistry, and harbor KRAS mutations. In a recent article published in The Journal of Pathology, Kommoss and colleagues used DNA methylation profiling to extend these similarities and showed that MLAs and MAs cluster together based on their epigenetic signatures and are epigenetically distinct from other Müllerian adenocarcinomas. They also showed that MLAs and MAs harbor a high number of global copy number alterations. This study provides evidence that MLAs more closely resemble MAs than Müllerian carcinomas on an epigenetic level. As a result, the authors argue that MLA should be renamed 'mesonephric-type adenocarcinoma.' Further research is needed to establish the relationship between these two entities, their etiology, and pathogenesis. © 2024 The Pathological Society of Great Britain and Ireland.

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