GroupID: 4

Case: 24Y0M, Sex Unknown, Ethnicity Unknown

DiseaseAssertion: assumed VHL

FamilyInfo: 1 of the 573 patients discussed in this paper were found to have this variant. This mutation (c.166dupG) was found in 1 VHL family with a single patient.

CasePresentingHPOs: HP:0009711; HP:0006880 (retinal capillary hemangioma; cerebellar hemangioblastoma)

CaseHPOFreeText: patient had cerebellar hemangioblastoma at 15Y and retinal capillary hemangioma at 24Y

CaseNotHPOs: HP:0005584; HP:0002666 (renal cell carcinoma, pheochromocytoma)

CaseNotHPOFreeText: N/A

CasePreviousTesting: N/A

PreviouslyPublished: N/A

SupplementalData: Supplementary Table S1.

Variant: p.A56Gfs*76 (c.166dupG)

CaseProblemVariantFreeText: N/A

LegacyVariant: N/A

ClinVarID: N/A

CAID: CA645524645 http://reg.clinicalgenome.org/redmine/projects/registry/genboree_registry/allele?hgvsOrDescriptor=NM_000551.3%3Ac.166dupG

gnomAD: N/A

VariantEvidence: N/A

MutationType: duplication

CivicName: A56fs (c.166dup)

MultipleGeneVariants: N/A

Genotype-phenotype correlations of 573 VHL patients from 200 kindreds were analyzed and confirmed that higher risk of pheochromocytoma is associated with missense mutations that result in substitution of a surface amino acid or that disrupt the structural integrity of the VHL gene product (pVHL). Age-related risks of retinal hemangoblastomas and renal cell carcinoma were higher in patients with nonsense or frameshift mutations. Southern blot and/or MLPA analysis by whole blood detected this mutation (c.164_165insG) which causes a frameshift and truncation allele. It was recorded here in 1 VHL family with 10 affected members. 7 had retinal angiomas, 3 has cerebellar hemangioblatomas, 2 had RCC and 3 had pheochromocytomas.