PatientID: III-2

KindredID: 1

Case: M, 16Y0M, ethnicity unknown

DiseaseAssertion: VHL

FamilyInfo:  2 young male twins were examined with the VHL gene mutation with simultaneously manifesting hemangioblastomas of the right cerebellar hemisphere. Both parents were examined with no VHL mutation, detecting a de novo mutation in the twins. A third sibling, two years older, presented with a cafè au lait skin spot. Grand mother had bilateral high myopia and glaucoma. The medical history of the pedigree shows that member (I-1) had severe hypertension and died at 60 from a stroke, member (I-2) died at 40 from ovarian carcinoma, and member (I-3) died at 54 from clinically diagnosed intracerebral haemorrhage.

CasePresentingHPOs: HP:0006880; HP:0009713 (cerebellar hemangioblastoma, spinal hemangioblastoma)

CaseHPOFreeText: in 1994 patient came complaining of blurred vision thought to be due to his myopia. MRI showed a large cyst and a 4.3 cm mural ovoid nodule in the right cerebellar hemisphere. Another small mural nodule was present in the infero-posterolateral portion of the right cerebellar hemisphere. CT disclosed a round homogeneous, hyperintense nodule at T1 in the spinal cord. Raised intracranial pressure due to the compression of aqueduct from the tumour accounted for hydrocephalus and enlarged lateral and 3rd ventricles.

CaseNotHPOs: HP:0001901 (polycythemia)

CaseNotHPOFreeText: N/A

CasePreviousTesting: N/A

PreviouslyPublished: N/A

SupplementalData: N/A

Variant: p.N78S (c.233A>G)

CaseProblemVariantFreeText: N/A

LegacyVariant: p.N78S (c.446A>G)

ClinVarID: 93326 https://www.ncbi.nlm.nih.gov/clinvar/variation/93326/

CAID: N/A

gnomAD: N/A

VariantEvidence: N/A

MutationType: missense_variant; transition

CivicName: N/A

MultipleGeneVariants: N/A

PatientID: N/A (father)

KindredID: 1

Case: M, Age Unknown (deceased), South Asian (Saudi)

DiseaseAssertion: assumed VHL

FamilyInfo: History of family showed that his 4/8 children tested positive for the 384delT mutation. suggesting that he likely passed it onto them. One son (case) presented with adrenal pheochromocytoma, pancreatic cysts, and renal cell carcinoma.

CasePresentingHPOs: HP:0005584 (renal cell carcinoma)

CaseHPOFreeText: He died as a complication of metastatic renal carcinoma.

CaseNotHPOs: N/A

CaseNotHPOFreeText: N/A

CasePreviousTesting: N/A

PreviouslyPublished: N/A

SupplementalData: N/A

Variant: p.L129Trpfs*30 (c.384delT) [assumed]

LegacyVariant: N/A

CaseProblemVariantFreeText: N/A

ClinVarID: N/A

CAID: CA70049452 https://reg.clinicalgenome.org/redmine/projects/registry/genboree_registry/allele?hgvsOrDescriptor=NM_000551.3%3Ac.384delT

gnomAD: N/A

VariantEvidence: N/A

MutationType: minus_1_frameshift_variant

CivicName: N/A

MultipleGeneVariants: N/A

PatientID: 1 (case)

KindredID: 1

Case: F, 37Y0M, Ethnicity Unknown

DiseaseAssertion: adrenal pheochromocytoma

FamilyInfo: Her one sister had died just after delivery, following a severe hypertensive crisis. Her 26-year-old niece presented with a 3 cm left adrenal tumor, an 8 cm pancreatic tumor and disseminated hepatic metastasis, evolving to death within a few months. Her liver biopsy was compatible with a moderately differentiated neuroendocrine carcinoma of uncertain origin. Molecular diagnosis was not performed in the affected sister and niece. Her asymptomatic 5Y old daughter tested positive for the mutation: Q164R (c.491A<G).

CasePresentingHPOs: HP:0006748 (adrenal pheochromocytoma)

CaseHPOFreeText: She first presented with paroxisms of severe hypertension associated with headaches, diaphoresis and, ocasionally, fainting, started one year before. She had had acute pulmonary edema and a cardiorespiratory arrest during her first caesarean section. A CT scan revealed a right adrenal tumor (6.0 cm), showing increased 123I-MIBG uptake. After conventional adrenalectomy, a PHEO was immunohistochemically confirmed. Close follow-up has shown no signs of recurrence or evidence of new tumors.

CaseNotHPOs: N/A

CaseNotHPOFreeText: N/A

CasePreviousTesting: N/A

PreviouslyPublished: N/A

SupplementalData: N/A

Variant: p.Q164R (c.491A>G)

LegacyVariant: N/A

CaseProblemVariantFreeText: N/A

ClinVarID: 2238 https://www.ncbi.nlm.nih.gov/clinvar/variation/2238/

CAID: N/A

gnomAD: N/A

VariantEvidence: To date, this germline VHL mutation was said to have been described in only 3 cases, with variable phenotypes, and in 2 cases PHEO occurred at a very young age.

MutationType: missense_variant;transition

CivicName: N/A

MultipleGeneVariants: N/A