Two unrelated cases with biallelic CHEK2 variants:a novel condition with constitutional chromosomal instability?

Constitutional heterozygous mutations in CHEK2 gene have been associated with hereditary cancer risk. To date, only a few homozygous CHEK2 mutations have been reported in families with cancer susceptibility. Here, we report two unrelated individuals with a personal and familial cancer history in whom biallelic CHEK2 alterations were identified.

Discordant cfDNA-NIPT result unraveling a trisomy 12 chronic lymphocytic leukemia in a 37 years old pregnant woman.

What's already known about this topic? Discordant NIPT results can rarely unravel maternal malignancies, especially when multiple chromosomal imbalances are reported. Both solid and hematological neoplasms have been described. What does this study add? This is the first case of a discordant NIPT result due to Chronic Lymphocytic Leukemia associated with trisomy of the chromosome 12.

Clinical and molecular characterization of a boy with intellectual disability, facial dysmorphism, minor digital anomalies and a complex IL1RAPL1 intragenic rearrangement.

X-linked intellectual disability accounts for 10-12% of cases of cognitive impairment in males. Mutations in IL1RAPL1 are an emerging form of apparently non-syndromic X-linked intellectual disability. We report a 8-year-old intellectually disabled boy with speech delay, and unusual facial and digital anomalies who showed a novel and complex IL1RAPL1 rearrangement.