A tumor focused approach to resolving the etiology of DNA mismatch repair deficient tumors classified as suspected Lynch syndrome

Routine screening of tumors for DNA mismatch repair (MMR) deficiency (dMMR) in colorectal (CRC), endometrial (EC) and sebaceous skin (SST) tumors leads to a significant proportion of unresolved cases classified as suspected Lynch syndrome (SLS). A tumor-focused testing approach reclassified 86.9% of SLS into Lynch syndrome, sporadic dMMR or MMR-proficient cases. These findings support the incorporation of tumor sequencing and alternate MLH1 methylation assays into clinical diagnostics to reduce the number of SLS patients and provide more appropriate surveillance and screening recommendations.

Type: Cancer Genomics
Archiver: European Genome-Phenome Archive (EGA)

1 Dataset 1 Publication

Click on a Dataset ID in the table below to learn more, and to find out who to contact about access to these data

Dataset ID	Description	Technology	Samples
EGAD50000000031	This dataset comprises a genomic and a phenotypic excel sheet displaying 137 cases classified as suspected Lynch syndrome. Included are genotypic data such as tumour mutational burden, tumour mutational signatures and germline/somatic variant calls for each colorectal, endometrial or sebaceous skin tumour screened. Genomic data is derived from targeted multigene panel sequencing including ~300 hereditary cancer genes.	Illumina NovaSeq 6000	137

Publications	Citations
A tumor focused approach to resolving the etiology of DNA mismatch repair deficient tumors classified as suspected Lynch syndrome. Walker R, Mahmood K, Joo JE, Clendenning M, Georgeson P, Como J, Joseland S, Preston SG, Antill Y, Austin R, Boussioutas A, Bowman M, Burke J, Campbell A, Daneshvar S, Edwards E, Gleeson M, Goodwin A, Harris MT, Henderson A, Higgins M, Hopper JL, Hutchinson RA, Ip E, Isbister J, Kasem K, Marfan H, Milnes D, Ng A, Nichols C, O'Connell S, Pachter N, Pope BJ, Poplawski N, Ragunathan A, Smyth C, Spigelman A, Storey K, Susman R, Taylor JA, Warwick L, Wilding M, Williams R, Win AK, Walsh MD, Macrae FA, Jenkins MA, Rosty C, Winship IM, Buchanan DD, Family Cancer Clinics of Australia. J Transl Med 21: 2023 282	3

Publications

Citations

A tumor focused approach to resolving the etiology of DNA mismatch repair deficient tumors classified as suspected Lynch syndrome.
Walker R, Mahmood K, Joo JE, Clendenning M, Georgeson P, Como J, Joseland S, Preston SG, Antill Y, Austin R, Boussioutas A, Bowman M, Burke J, Campbell A, Daneshvar S, Edwards E, Gleeson M, Goodwin A, Harris MT, Henderson A, Higgins M, Hopper JL, Hutchinson RA, Ip E, Isbister J, Kasem K, Marfan H, Milnes D, Ng A, Nichols C, O'Connell S, Pachter N, Pope BJ, Poplawski N, Ragunathan A, Smyth C, Spigelman A, Storey K, Susman R, Taylor JA, Warwick L, Wilding M, Williams R, Win AK, Walsh MD, Macrae FA, Jenkins MA, Rosty C, Winship IM, Buchanan DD, Family Cancer Clinics of Australia. J Transl Med 21: 2023 282