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- W2964452262 abstract "e17021 Background: Postmeiotic segregation Increased 2 (PMS2) gene is one of the gene family members found in clusters on chromosome 7 involved in DNA mismatch repair. Mutations in this gene are associated with hereditary nonpolyposis colorectal cancer and Turcot syndrome. PMS-2 defects are not extensively studied and hence there is still considerable potential to detect new hemato-oncological associations with same. Chromosome 7 defects are the most commonly associated genetic abnormalities associated with myelodysplastic syndrome (MDS). Here, we describe a case of a patient with known PMS 2 gene deletion presenting with early onset MDS. Methods: A 52 year old caucasian female came in to our oncology clinic for evaluation after being diagnosed with DCIS of right breast. She underwent surgical resection followed by tamoxifen and surviellance mamograms. She developed gradual onset of fatigue, prompting follow-up laboratory tests which revealed WBC of 8,600, Hgb of 8.5, MCV of 101, and Plt 383,000. B12, folate, and iron studies were normal. Bone marrow biopsy revealed cellularity 80% and cytogenetics with trisomy 8.This lead to diagnosis of myelodysplastic syndrome, refractory cytopenia with multilineage dysplasia and ringed sideroblasts (RCMD-RS). Patient is currently treated with supportive transfusions after lack of benefit of darbopoietin (baseline epo level 67). Family history is pertinent for a son who died at age 21 from colon cancer and a daughter diagnosed at age 22 with colon cancer, who survives. Her daughter subsequently tested positive for G750 PMS-2 from her father and complete deletion of PMS2 from her mother (our patient). Results: PMS2 gene deletion might predispose patients to MDS. Conclusions: Given the common link with chromosome 7 abnormalities, it is therefore possible that there is an associated increased risk of MDS in PMS-2 patients. While our patient did not have any general abnormalities by karyotype, current assays and general karyotyping are of potentially limited value unless specific mutation points are identified. Therefore, additional evaluations may be necessary to better identify at-risk patients." @default.
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- W2964452262 date "2012-05-20" @default.
- W2964452262 modified "2023-10-02" @default.
- W2964452262 title "Possible association of postmeiotic segregation increased 2 (PMS 2) gene deletion and myelodysplastic syndrome." @default.
- W2964452262 doi "https://doi.org/10.1200/jco.2012.30.15_suppl.e17021" @default.
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