GroupID: 19a

Case: Sex Unknown, Age Unknown, Ethnicity Unknown

DiseaseAssertion: VHL

CohortInfo: a retrospective cohort study from an eye centre in Germany involved 148 VHL patients and their genetic data involved in retinal capillary hemangiomas.

CasePresentingHPOs: HP:0009711 (retinal capillary hemangioma)

CaseHPOFreeText: This was 1 of 2 patients discussed with this mutation. The individual had retinal hemangiomas; Other VHL manifestations were discussed but not per- variant.

CaseNotHPOs: N/A

CaseNotHPOFreeText: N/A

CasePreviousTesting: N/A

PreviouslyPublished: N/A

SupplementalData: Yes - Supplementary Table S1

Variant: p.R79G (c.235C>G)

LegacyVariant: N/A

CaseProblemVariantFreeText: N/A

ClinVarID: 411988 https://www.ncbi.nlm.nih.gov/clinvar/variation/411988/

CAID: N/A

gnomAD: N/A

VariantEvidence: N/A

MutationType: missense_variant; transversion

CivicName: R79G (c.235C>G)

MultipleGeneVariants: N/A

GroupID: 19b

Case: Sex Unknown, Age Unknown, Ethnicity Unknown

DiseaseAssertion: VHL

CohortInfo: a retrospective cohort study from an eye centre in Germany involved 148 VHL patients and their genetic data involved in retinal capillary hemangiomas.

CasePresentingHPOs: N/A

CaseHPOFreeText: This was 1 of 2 patients discussed with this mutation. The individual did NOT have retinal hemangiomas; Other VHL manifestations were discussed but not per- variant.

CaseNotHPOs: HP:0009711 (retinal capillary hemangioma)

CaseNotHPOFreeText: N/A

CasePreviousTesting: N/A

PreviouslyPublished: N/A

SupplementalData: Yes - Supplementary Table S1

Variant: p.R79G (c.235C>G)

LegacyVariant: N/A

CaseProblemVariantFreeText: N/A

ClinVarID: 411988 https://www.ncbi.nlm.nih.gov/clinvar/variation/411988/

CAID: N/A

gnomAD: N/A

VariantEvidence: N/A

MutationType: missense_variant; transversion

CivicName: R79G (c.235C>G)

MultipleGeneVariants: N/A

216 patients with clinically expected VHL disease due to family history or presence of VHL typical tumours were routinely examined in an eye centre in Germany between January 2019 and January 2020, majority of which were of European descent (~95%). Since data on the genotype–phenotype correlation of the onset of Retinal Hemangioblastoma (RH) is scarce in relation to VHL disease, this study wanted to inversitage the relationship between VHL gene variants (truncating vs single amino acid substitutions) and the ocular phenotype of the disease. 42 different rare VHL gene variants in 148 patients were detected - some of whom had RH and some who did not. Although date of onset of RH, as well as data on central nervous system haemangioblastomas (CNSH), pheochromocytoma/paraganglioma (PPGL), clear cell renal cell carcinoma (ccRCC) and pancreatic neuroendocrine neoplasm (PNEN) were collected, it was not reported on a per patient basis and therefore could not be discussed per variant. There were 2 patients reported with the p.R79G (c.235C>G) mutation. One member presented with retinal hemangiomas, while the other did not - however no other clinical manifestations were discussed. Additionally, no family information was provided.

PatientID: 2 (father)

KindredID: 1

Case: M, 40Y0M, Ethnicity Unknown

DiseaseAssertion: pheochromocytoma

FamilyInfo: Familial isolated pheochromocytoma is described as the son is a carrier of the same mutation: R79G (c.235C>G).

CasePresentingHPOs: HP:0002666; HP:0006748 (pheochromocytoma, adrenal pheochromocytoma)

CaseHPOFreeText: unilateral pheochromocytoma at 40Y, without other adjacent pathology. Renal ultrasound: identified a 5.5 x 4.4 cm mass with cystic areas, inside right adrenal gland, with mainly peripheral vascularization. Surgical laparoscopy after performing block, first alpha, and then beta adrenergic. Complete tumor resection.

CaseNotHPOs: N/A

CaseNotHPOFreeText: N/A

CasePreviousTesting: N/A

PreviouslyPublished: N/A

SupplementalData: N/A

Variant: p.R79G (c.235C>G)

LegacyVariant: N/A

CaseProblemVariantFreeText: N/A

ClinVarID: 411988 https://www.ncbi.nlm.nih.gov/clinvar/variation/411988/

CAID: N/A

gnomAD: N/A

VariantEvidence: N/A

MutationType: missense_variant;transversion

CivicName: N/A

MultipleGeneVariants: N/A

PatientID: 1 (son)

KindredID: 1

Case: M, 9Y0M, Ethnicity Unknown

DiseaseAssertion: pheochromocytoma

FamilyInfo: Familial isolated pheochromocytoma is described as the father is a carrier of the same mutation: R79G (c.235C>G).

CasePresentingHPOs: HP:0006748 (adrenal pheochromocytoma)

CaseHPOFreeText: history of fever, profuse sweating, intense headache and 190/120 blood pressure. He was currently asymptomatic with normal hormonal controls after complete tumor resection of his right adrenals

CaseNotHPOs: N/A

CaseNotHPOFreeText: N/A

CasePreviousTesting: N/A

PreviouslyPublished: N/A

SupplementalData: N/A

Variant: p.R79G (c.235C>G)

LegacyVariant: N/A

CaseProblemVariantFreeText: N/A

ClinVarID: 411988 https://www.ncbi.nlm.nih.gov/clinvar/variation/411988/

CAID: N/A

gnomAD: N/A

VariantEvidence: N/A

MutationType: missense_variant;transversion

CivicName: N/A

MultipleGeneVariants: N/A

This abstract reported the case of unilateral single familial pheochromocytoma diagosed in a father and his son. They both carried a single mutation in the VHL gene, c.235C>G (p.R79G). The son was diagnosed and treated at age 9, while the father was intervened at age 40. ACMG: 'PP4' because the patients' phenotypes and family history are highly specidic for a disease with single genetic etiology.

PatientID: 2

KindredID: 2

Case: Sex Unknown, Age Unknown, Ethnicity Unknown

DiseaseAssertion: VHL

FamilyInfo: No family information provided.

CasePresentingHPOs: HP:0002666; HP:0002668 (Pheochromocytoma; paraganglioma)

CaseHPOFreeText: Patient had pheochromocytoma and/or paraganglioma (table 2).

CaseNotHPOs: N/A

CaseNotHPOFreeText: N/A

CasePreviousTesting: N/A

PreviouslyPublished: N/A

SupplementalData: N/A

Variant: p.R79G (c.235C>G)

LegacyVariant: N/A

CaseProblemVariantFreeText: N/A

ClinVarID: 411988, https://www.ncbi.nlm.nih.gov/clinvar/variation/411988/

CAID: N/A

gnomAD: N/A

VariantEvidence: N/A

MutationType: missense_variant, transversion

CivicName: R79G (c.235C>G)

MultipleGeneVariants: N/A