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Challenges in the I...
Challenges in the Identification of MSH6-Associated Colorectal Cancer: Rectal Location, Less Typical Histology, and a Subset With Retained Mismatch Repair Function.
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Klarskov, Louise (författare)
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Holck, Susanne (författare)
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Bernstein, Inge (författare)
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Okkels, Henrik (författare)
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- Rambech, Eva (författare)
- Lund University,Lunds universitet,Bröstcancer-genetik,Sektion I,Institutionen för kliniska vetenskaper, Lund,Medicinska fakulteten,Breastcancer-genetics,Section I,Department of Clinical Sciences, Lund,Faculty of Medicine
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- Baldetorp, Bo (författare)
- Lund University,Lunds universitet,Bröstcancer-genetik,Sektion I,Institutionen för kliniska vetenskaper, Lund,Medicinska fakulteten,Breastcancer-genetics,Section I,Department of Clinical Sciences, Lund,Faculty of Medicine
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- Nilbert, Mef (författare)
- Lund University,Lunds universitet,Bröstcancer-genetik,Sektion I,Institutionen för kliniska vetenskaper, Lund,Medicinska fakulteten,Breastcancer-genetics,Section I,Department of Clinical Sciences, Lund,Faculty of Medicine
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(creator_code:org_t)
- 2011
- 2011
- Engelska.
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Ingår i: American Journal of Surgical Pathology. - 1532-0979. ; 35:9, s. 1391-1399
- Relaterad länk:
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http://www.ncbi.nlm....
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http://dx.doi.org/10...
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https://lup.lub.lu.s...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Identification of Lynch syndrome tumors is challenging. This relates particularly to MSH6-associated cases, which show reduced penetrance of colorectal cancer and a higher age at diagnosis. We recorded the clinical and morphologic features of 52 MSH6-associated colorectal cancers in comparison with MLH1/MSH2-mutant tumors and sporadic mismatch repair-deficient cancers. In the MSH6 subset, we confirmed a higher age (median, 56 y) at diagnosis and found a significantly larger proportion (25%) of rectal cancers. Presence of dirty necrosis was the sole histologic component that significantly differed between MSH6 and MLH1/MSH2 tumors. Compared with the sporadic mismatch repair-defective cohort, MSH6 cases had a lower prevalence of tumor-infiltrating lymphocytes and Crohn-like reactions. Mismatch repair defects were identified in 92% of MSH6 tumors, with high concordance between microsatellite instability and loss of immunohistochemical MSH6 expression. The remaining 8% showed a mismatch repair-stable phenotype, which suggests that analysis of additional tumors might be considered in families suspected of Lynch syndrome.
Ämnesord
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Kirurgi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Surgery (hsv//eng)
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