Metachronous Wilms Tumor, Glioblastoma, and T-cell Leukemia in an Child With Constitutional Mismatch Repair Deficiency syndrome due to Novel Mutation in MSH6 (c.2590G>T).
Whole-exome capture and massively parallel sequencing combined with homozygosity mapping identified a homozygous novel mutation in the MSH6 gene that leads to constitutional mismatch repair deficiency syndrome and increased cancer risk.
Biallelic germline mutations of Constitutional mismatch repair-deficiency syndrome (CMMR-D) genes, MLH1, MSH2, MSH6, and PMS2 are characterized by increased risk of childhood malignancy.