ClinVar

Description

Variant summary: CDH1 c.214G>A (p.Asp72Asn) results in a conservative amino acid change located in the Cadherin prodomain (IPR014868) of the encoded protein sequence. Three of five in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 4.9e-05 in 1607036 control chromosomes, predominantly at a frequency of 0.00045 within the Latino subpopulation in the gnomAD database (v4 dataset). The observed variant frequency within Latino control individuals in the gnomAD database is approximately 16-fold of the estimated maximal expected allele frequency for a pathogenic variant in CDH1 causing Hereditary Diffuse Gastric Cancer phenotype (2.8e-05), strongly suggesting that the variant is a benign polymorphism found primarily in populations of Latino origin. The variant, c.214G>A, has been reported in the literature in individuals affected with breast cancer (Tsaousis_2019, Dorling_2021), but it was also found in several controls (Momozawa_2018, Dorling_2021, Okawa_2023). In addition, this variant was also reported in 3/7325 European American women, who were older than age 70, and have never had cancer (in the FLOSSIES database). These reports do not provide unequivocal conclusions about association of the variant with Hereditary Diffuse Gastric Cancer. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. The following publications have been ascertained in the context of this evaluation (PMID: NO_PMID, 19011631, 30287823, 31159747, 33471991, 36243179). ClinVar contains an entry for this variant (Variation ID: 136064). Based on the evidence outlined above, the variant was classified as likely benign.