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Genetic and histological analysis intraplacental choriocarcinoma: a case report.
Medical Molecular Morphology 2024 Februrary 30
We report on single case of intraplacental choriocarcinoma (IC) coexisting with feto-maternal hemorrhage from our hospital, a rare malignant tumor that occurs in the chorionic villous trophoblast. To investigate genetic and epigenetic changes to the carcinogenesis of IC, we employed cancer gene panel analysis and whole methylation analysis from a recent case of IC. By Short Tandem Repeats analysis, we confirmed that the tumor of present IC was derived from concurrent normal chorionic villous trophoblast cells. No mutation was found in 145 cancer-related genes. Meanwhile, amplification in MDM2 gene was observed. Furthermore, we observed deferentially methylated CpG sites between tumor and surrounding normal placenta in present IC case. These observations suggest that IC might be arisen as a result of aberrations of methylation rather than of DNA mutations. Further studies are needed to clarify association between aberrant methylation and choriocarcinogenesis.
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