| Home > Articles > Published articles > Tumor analysis of MMR genes in Lynch-like syndrome : |
| Date: | 2024 |
| Abstract: | Up to 70% of suspected Lynch syndrome patients harboring MMR deficient tumors lack identifiable germline pathogenic variants in MMR genes, being referred to as Lynch-like syndrome (LLS). Previous studies have reported biallelic somatic MMR inactivation in a variable range of LLS-associated tumors. Moreover, translating tumor testing results into patient management remains controversial. Our aim is to assess the challenges associated with the implementation of tumoral MMR gene testing in routine workflows. Methods: Here, we present the clinical characterization of 229 LLS patients. MMR gene testing was performed in 39 available tumors, and results were analyzed using two variant allele frequency (VAF) thresholds (≥5% and ≥10%). Results and Discussion: More biallelic somatic events were identified at VAF ≥ 5% than ≥10% (35. 9% vs. 25. 6%), although the rate of nonconcordant results regarding immunohistochemical pattern increased (30. 8% vs. 20. 5%). Interpretation difficulties question the current utility of the identification of MMR somatic hits in the diagnostic algorithm of suspected LS cases. |
| Grants: | Instituto de Salud Carlos III PI19/00553 Agencia Estatal de Investigación PID2019-111254RB-I00 Ministerio de Economía y Competitividad CB16/12/00234 |
| Rights: | Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original. |
| Language: | Anglès |
| Document: | Article ; recerca ; Versió publicada |
| Subject: | Lynch syndrome ; Lynch-like syndrome ; Clinical management ; Mismatch repair genes ; Mismatch repair-deficiency ; Tumor testing |
| Published in: | Cancer Medicine, Vol. 13 Núm. 7 (april 2024) , p. e7041, ISSN 2045-7634 |
7 p, 6.6 MB |