Journal
CANCERS
Volume 13, Issue 3, Pages -Publisher
MDPI
DOI: 10.3390/cancers13030467
Keywords
Lynch syndrome; microsatellite instability; mismatch repair genes; MLH1 promoter methylation; BRAF mutation
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Microsatellite instability (MSI) is a hallmark of Lynch syndrome (LS)-related tumors, but it is not exclusive to LS, as most MSI/mismatch repair-deficient (dMMR) tumors are sporadic. Advances in diagnostic and screening strategies have evolved in recent years, focusing on identifying LS patients and distinguishing LS-related from sporadic MSI tumors. Discussions on pitfalls associated with current strategies aim to improve LS diagnosis and prevent inappropriate clinical management.
Simple Summary Microsatellite instability (MSI) is a hallmark of Lynch syndrome (LS)-related tumors but is not specific, as most of MSI/mismatch repair-deficient (dMMR) tumors are sporadic. Therefore, the identification of MSI/dMMR requires additional diagnostic tools to identify LS. In this review, we address the hallmarks of LS and present recent advances in diagnostic and screening strategies to identify LS patients. We also discuss the pitfalls associated with current strategies, which should be taken into account in order to improve the diagnosis of LS. Microsatellite instability (MSI) is a hallmark of Lynch syndrome (LS)-related tumors but is not specific to it, as approximately 80% of MSI/mismatch repair-deficient (dMMR) tumors are sporadic. Methods leading to the diagnosis of LS have considerably evolved in recent years and so have tumoral tests for LS screening and for the discrimination of LS-related to MSI-sporadic tumors. In this review, we address the hallmarks of LS, including the clinical, histopathological, and molecular features. We present recent advances in diagnostic and screening strategies to identify LS patients. We also discuss the pitfalls associated with the current strategies, which should be taken into account to improve the diagnosis of LS and avoid inappropriate clinical management.
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