Submissions for variant NM_001018115.3(FANCD2):c.491+10G>A

gnomAD frequency: 0.00103  dbSNP: rs17032279

Total submissions: 5

Submitter	RCV	SCV	Clinical significance	Condition	Last evaluated	Review status	Method	Comment
Illumina Laboratory Services, Illumina	RCV001094770	SCV000439463	uncertain significance	Fanconi anemia complementation group D2	2018-01-12	criteria provided, single submitter	clinical testing	This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease.
Labcorp Genetics (formerly Invitae), Labcorp	RCV000317060	SCV000558543	benign	Fanconi anemia	2025-01-17	criteria provided, single submitter	clinical testing
Genetic Services Laboratory, University of Chicago	RCV001821030	SCV002070975	likely benign	not specified	2021-06-14	criteria provided, single submitter	clinical testing
National Health Laboratory Service, Universitas Academic Hospital and University of the Free State	RCV002225594	SCV002505182	likely benign	Hereditary breast ovarian cancer syndrome	2022-04-19	criteria provided, single submitter	clinical testing
Women's Health and Genetics/Laboratory Corporation of America, LabCorp	RCV001821030	SCV002547621	benign	not specified	2022-05-16	criteria provided, single submitter	clinical testing	Variant summary: FANCD2 c.491+10G>A alters a non-conserved nucleotide located close to a canonical splice site and therefore could affect mRNA splicing, leading to a significantly altered protein sequence. 4/4 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 0.00098 in 251368 control chromosomes in the gnomAD database, including 3 homozygotes. The observed variant frequency is approximately 2.0 fold of the estimated maximal expected allele frequency for a pathogenic variant in FANCD2 causing Fanconi Anemia phenotype (0.00048), strongly suggesting that the variant is benign. To our knowledge, no occurrence of c.491+10G>A in individuals affected with Fanconi Anemia and no experimental evidence demonstrating its impact on protein function have been reported. Four clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation (likely benign, n=3; VUS, n=1). Based on the evidence outlined above, the variant was classified as benign.