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Background

Granulosa cell tumors are rare ovarian malignancies. Their characteristics include unpredictable indolent growth with malignant potential and late recurrence. Approximately 95% are of adult type. Recent molecular studies have characterized the FOXL2 402C > G mutation in adult granulosa cell tumor. Our previous case report showed that unique FOXL2 402C > G mutation and defective DNA mismatch repair system are associated with the development of adult granulosa cell tumor.

Findings

In this study, the DNA sequences of four genes, MSH2, MLH1, MSH6, and PMS2, in the DNA mismatch repair system were determined via direct sequencing to elucidate the exact mechanism for the development of this granulosa cell tumor. The results showed that two missense germline mutations, T485K and N775L, inactivate the PMS2 gene.

Conclusions

The results of this case study indicated that although FOXL2 402C > G mutation determines the development of granulosa cell tumor, PMS2 mutation may be the initial driver of carcinogenesis. Immunohistochemistry-based tumor testing for mismatch repair gene expression may be necessary for granulosa cell tumors to determine their malignant potential or if they are part of Lynch syndrome."xsd:string
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http://purl.uniprot.org/citations/28347324http://purl.uniprot.org/core/author"Wang W.C."xsd:string
http://purl.uniprot.org/citations/28347324http://purl.uniprot.org/core/author"Lee Y.T."xsd:string
http://purl.uniprot.org/citations/28347324http://purl.uniprot.org/core/author"Lai Y.C."xsd:string
http://purl.uniprot.org/citations/28347324http://purl.uniprot.org/core/date"2017"xsd:gYear
http://purl.uniprot.org/citations/28347324http://purl.uniprot.org/core/name"J Ovarian Res"xsd:string
http://purl.uniprot.org/citations/28347324http://purl.uniprot.org/core/pages"22"xsd:string
http://purl.uniprot.org/citations/28347324http://purl.uniprot.org/core/title"PMS2 gene mutation results in DNA mismatch repair system failure in a case of adult granulosa cell tumor."xsd:string
http://purl.uniprot.org/citations/28347324http://purl.uniprot.org/core/volume"10"xsd:string
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