PatientID: 3

KindredID: 1

Case: F, 14Y0M, Japanese

DiseaseAssertion: assumed VHL

FamilyInfo: Mother (39Y) with retinal angiomas and cerebellar hemangioblastoma, and her older sister (P1) with cerebellar hemangioblastoma, retinal capillary hemangioma, pancreatic cysts and a hearing impairment both had the p.P86L VHL mutation. Father did not.

CasePresentingHPOs: HP:0006880; HP:0010302; HP:0009711; HP:0001737; HP:0000107 (cerebellar hemangioblastoma; spinal cord tumor; retinal capillary hemangioma; Pancreatic cysts; renal cyst)

CaseHPOFreeText: at age 14 had 3 small inter cranial tumors (not removed) and by at 19 years had obstructive hydrocephalus caused by enlargement of the cerebellar tumors (hemangioblastomas). Retinal angiomas were found in the right eye, cystic lesions in the pancreas and the left kidney, and a cystic tumor in the cervical cord

CaseNotHPOs: N/A

CaseNotHPOFreeText: N/A

CasePreviousTesting: N/A

PreviouslyPublished: N/A

SupplementalData: N/A

Variant: p.P86L (c.257C>T)

CaseProblemVariantFreeText: N/A

LegacyVariant: N/A

ClinVarID: 182977 https://www.ncbi.nlm.nih.gov/clinvar/variation/182977/

CAID: N/A

gnomAD: N/A

VariantEvidence: N/A

MutationType: missense_variant;transition

CivicName: P86L (c.257C>T)

MultipleGeneVariants: N/A

PatientID: 8

KindredID: 4

Case: M, 14Y0M, Ethnicity Unknown

DiseaseAssertion: VHL

FamilyInfo: A family pedigree is provided in figure 1. The parents of patient 8 were molecularly tested and neither possessed the mutation; thus, the mutation was identified as de novo. Neither parent had VHL syndrome characterized by retinal capillary hemangiomas (RCHs).

CasePresentingHPOs: HP:0006880; HP:0009711 (Cerebellar hemangioblastoma; Retinal capillary hemangioma)

CaseHPOFreeText: In 2019, a 14-year-old boy was diagnosed with visual impairment, due to visual acuity of 20/20 in the right eye and 20/640 in the left eye. Four peripheral RCHs were detected in the right eye. The visual impairment of the left eye was due to the severe exudative process involving the macula. Moreover, numerous microhemangioblastomas were revealed by fluorescein angiography. Laser therapy was performed in both eyes, but vitreous hemorrhage occurred in the left eye. Bevacizumab was given three times, as well simultaneous cryotherapies were performed under general anesthesia. Many laser sessions were performed for regression of the RCHs to occur. Further testing revealed a cerebellar hemangioblastoma.

CaseNotHPOs: N/A

CaseNotHPOFreeText: Patient did not have other known tumours.

CasePreviousTesting: N/A

PreviouslyPublished: N/A

SupplementalData: N/A

Variant: p.R113* (c.337C>T)

LegacyVariant: N/A

CaseProblemVariantFreeText: N/A

ClinVarID: 220414, https://www.ncbi.nlm.nih.gov/clinvar/variation/220414/

CAID: N/A

gnomAD: N/A

VariantEvidence: N/A

MutationType: stop_gained

CivicName: R113* (c.337C>T)

MultipleGeneVariants: N/A

GroupID: 42

DiseaseAssertion: assumed VHL

GroupSize: 3

GroupNumberMales: N/A

GroupNumberFemales: N/A

GroupEthnicity: N/A

GroupAgeRange: N/A

GroupInfo: 3 of the 573 patients discussed in this paper were found to have identical variants. This mutation was found in 1 VHL family with 3 patients.

GroupPresentingHPOs: HP:0009711; HP:0006880; HP:0002666 (retinal capillary hemangioma, cerebellar hemangioblastoma, pheochromocytoma)

GroupHPOFreeText: 2 had retinal hemangioblastoma at a mean age of 16Y, one had cerebellar hemangioblastoma at 16Y, and 1 had pheochromcytoma at 14Y.

GroupNotHPOs: HP:0005584 (renal cell carcinoma)

GroupNotHPOFreeText: N/A

GroupPreviousTesting: N/A

PreviouslyPublished: N/A

SupplementalData: Supplementary Table S1.

Variant: c.340+5G>C

LegacyVariant: N/A

CaseProblemVariantFreeText: N/A

ClinVarID: 36901, https://www.ncbi.nlm.nih.gov/clinvar/variation/36901/

CAID: N/A

gnomAD: 0.01119 https://gnomad.broadinstitute.org/variant/3-10183876-G-C

VariantEvidence: This variant’s large allele frequency means this is likely non disease causing (not deleterious).

MutationType: splice_site_variant

CivicName: Splice Region (c.340+5G>C)

MultipleGeneVariants: N/A