PatientID:4

KindredID: 4

Case: Sex Unknown, Age Unknown, Ethnicity Unknown

DiseaseAssertion: VHL

FamilyInfo: Positive.

CohortInfo:Between September 1994 and December 1997, 16 unrelated individuals were referred to Genetic Services of Western Australia by local clinicians and by similar genetic services in other States, for VHL gene mutation analysis because of clinical manifestations suggestive of the diagnosis.

CasePresentingHPOs: HP:0009711, HP:0010797 (retinal capillary hemangioma, hemangioblastoma)

CaseHPOFreeText: N/A

CaseNotHPOs: HP:0002666, HP:0005584, HP:0001737 (pheochromocytoma, renal cell carcinoma, pancreatic cysts)

CaseNotHPOFreeText: N/A

CasePreviousTesting: N/A

PreviouslyPublished: N/A

SupplementalData: N/A

Variant: p.V155M (c.463G>A)

CaseProblemVariantFreeText: N/A

LegacyVariant: p.V155M (c.676G>A)

ClinVarID: 223219 https://www.ncbi.nlm.nih.gov/clinvar/variation/223219/

CAID: N/A

gnomAD: N/A

VariantEvidence: N/A

MutationType: missense_variant; transition

CivicName: V155M (c.463G>A)

MultipleGeneVariants: N/A

The authors described the growth kinetics of 96 renal tumours in 64 VHL patients (32 males, 32 females). All patients had VHL disease with renal involvement. 54/64 had undergone renal surgery or a radiofrequency thermal ablation procedure for RCC. In 10/64 patients, at least one or more RCC was diagnosed. However, at the time of diagnosis, an indication for treatment was not yet present. For all patients, several CT/MRI scans existed for retrospective description of tumour growth kinetics. 10-ml EDTA anticoagulated blood samples were available from each patient for mutation screening of all exons of the VHL gene. Genomic DNA from blood samples was extracted using standard methods. Small deletions/insertions or point mutations were identified by DNA sequencing followed by complete mutation screening using PCR/single-strand conformation polymorphism and denaturing high-performance liquid chromatography. A germline missense variant p.V155M(c.463G>A) was identified in patient #4. This mutation was noted as c.676G>A in the paper due to a difference in reference transcript used (see Table S1). No family information is available for this patient.

A previous study of 26 Japanese, VHL families was extended to 41 additional families. Germline mutations were detected in 55 of 77 Japanese families using SSCP, direct sequencing, and Southern Blot analysis of peripheral blood samples. The V155M (c.463G>A) germline missense mutation was found in a VHL type 1 family of 9 affected individuals who presented with CNS hemangioblastoma (5/9), retinal angioma (1/9), renal cell carcinoma (9/9) and pancreatic tumor or cyst (unspecified) (2/9) (family ID 32). This family was previously reported in PMID 8634692.

PatientID: 4

KindredID: N/A

Case: Sex Unknown, Age Unknown, Ethnicity Unknown

DiseaseAssertion: VHL

FamilyInfo: N/A

CohortInfo: The authors evaluated 64 VHL patients (32 women and 32 men) with renal involvement of whom 54/64 had undergone renal surgery or a radiofrequency thermal ablation procedure for RCC. In 10/64 VHL patients, at least one or more RCC were diagnosed, however at the time of diagnosis an indication for treatment was not yet present. For all patients several CT/MRI scans existed for retrospective description of tumour growth kinetics.

CasePresentingHPOs: HP:0005584 (Renal cell carcinoma)

CaseHPOFreeText: This is a tumor resolution study (VHL patients were investigated based on the presence of renal tumors.) No other phenotypic information is available.

CaseNotHPOs: N/A

CaseNotHPOFreeText: N/A

CasePreviousTesting: N/A

PreviouslyPublished: N/A

SupplementalData: Supplementary Table S1 describes 19 patients with missense mutations, including this patient.

Variant: p.V155M(c.463G>A)

LegacyVariant: c.676G>A

CaseProblemVariantFreeText: N/A

ClinVarID: 223219, https://www.ncbi.nlm.nih.gov/clinvar/variation/223219/

CAID: N/A

gnomAD: N/A

VariantEvidence: N/A

MutationType: missense_variant;transition

CivicName: V155M (c.463G>A)

MultipleGeneVariants: N/A