ClinVar

Description

Variant summary: ALK c.3594C>T alters a non-conserved nucleotide resulting in a synonymous change. 5/5 computational tools predict no significant impact on normal splicing. However, these predictions have yet to be confirmed by functional studies. The variant allele was found at a frequency of 0.0014 in 276838 control chromosomes in the gnomAD database, including 3 homozygotes. The observed variant frequency is approximately 3355.03 fold of the estimated maximal expected allele frequency for a pathogenic variant in ALK causing Neuroblastoma, Susceptibility Type 3 phenotype (4.2e-07), strongly suggesting that the variant is benign. To our knowledge, no occurrence of c.3594C>T in individuals affected with Neuroblastoma, Susceptibility Type 3 and no experimental evidence demonstrating its impact on protein function have been reported. Six clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation. All laboratories classified the variant as benign/likely benign. Based on the evidence outlined above, the variant was classified as benign.