PatientID: DHPLC 1

KindredID: 1

Case: M, 51Y0M, Unknown Ethnicity

DiseaseAssertion: Assumed VHL

FamilyInfo: The patient’s daughter (DHPLC 1) had a pheochromocytoma at 11Y. At 18Y, she had a pheochromocytoma in the contralateral adrenal gland and two concurrent paragangliomas of the abdominal aorta and urinary bladder. At 25Y, she was found to have a right frontal meningioma. A family history obtained from his daughter’s other parent, one son and one other daughter (not DHPLC 1) was uninformative. The patient’s relatives (except for his daughter) were normal both clinically and biochemically.

CasePresentingHPOs: HP:0001028; HP:0000277; HP:0009715; HP:0000107 (Angioma, abnormality of the mandible, papillary cystadenoma of the epididymis, renal cyst)

CaseHPOFreeText: The patient had an attenuated VHL phenotype caused by mosaicism which led to what initially appeared to be a de novo mutation in his daughter (DHPLC 3). The patient was found to have an angioma of the glans penis and had had surgery for a mandibular cyst and epididymal cystadenomas at age 43Y. Abdominal ultrasonography and total-body magnetic resonance imaging (MRI) conducted at the time of the study (51Y) revealed a 2.3-cm cyst in his right kidney. His blood pressure and levels of plasma free metanephrines, fractionated urinary metanephrines, chromogranin A were normal.

CaseNotHPOs: N/A

CaseNotHPOFreeText: N/A

CasePreviousTesting: N/A

PreviouslyPublished: N/A

SupplementalData: N/A

Variant: p.R161Q (c.482G>A)

LegacyVariant: p.R161Q (c.695G>A)

ClinVarID: 182983, https://www.ncbi.nlm.nih.gov/clinvar/variation/182983/

gnomAD: N/A

VariantEvidence: N/A

MutationType: missense_variant;transition

CivicName: R161Q(c.482G>A)

MultipleGeneVariants: N/A

PatientID: 1

KindredID: 1

Case: M, 51Y0M, Arab

DiseaseAssertion: VHL

FamilyInfo: Patient 2 (the patient’s brother) presented with the same mutation and was diagnosed with VHL at age 45. The two brothers had very similar VHL clinical manifestations including cerebellar hemangioblastomas, renal cell carcinoma, and cysts in the pancreas. However, patient 1 had testicular and epididymal cysts, as well as lesions in the spine, which were absent in Patient 2. No other family history was noted. Immediate family members were recommended to genetically test for the relevant variant or monitor for VHL-related symptoms.

CasePresentingHPOs: HP:0005584; HP:0009713; HP:0006880; HP:0000107; HP:0001737; HP:0030424; HP:0033608; HP:0000541; HP:0012215 (renal cell carcinoma; spinal hemangioblastoma; cerebellar hemangioblastoma; renal cyst; pancreatic cysts; epididymal cyst; pulmonary nodule; retinal detachment; testicular microlithiasis)

CaseHPOFreeText: At 44Y, Patient 1 exhibited cerebellar and spinal hemangioblastomas, as well as retinal detachment. He also had renal cell carcinoma in both kidneys and multiple cysts in one kidney, testis, and pancreas. He also reported a history of headaches and vertigo, leading to a diagnosis of VHL disease type 1. At 49Y, multiple nodules were found in his lungs and a year later, a nodule in the testis and scrotal lithiasis were detected. At 51Y, renal cell carcinoma was identified in the left kidney and his left epididymis was enlarged. Patient continued to present with left testicular and scrotal lithiasis, right retinal detachment, and multiple nodules in both lungs. However, tMutation:Germlinehe lung phenotype was asymptomatic (see table 1).

CaseNotHPOs: HP:0001392; HP:0005264; HP:0001743 (abnormality of the liver; abnormality of the gallbladder; abnormality of the spleen)

CaseNotHPOFreeText: No lesions were observed in the liver, gallbladder, and spleen.

CasePreviousTesting: N/A

PreviouslyPublished: N/A

SupplementalData:  N/A

Variant: p.F76del (c.227_229del)

LegacyVariant: N/A

CaseProblemVariantFreeText: N/A

ClinVarID: N/A

CAID: CA357012, https://reg.clinicalgenome.org/redmine/projects/registry/genboree_registry/allele?hgvsOrDescriptor=NM_000551.3%3Ac.227_229delTCT

gnomAD: N/A

VariantEvidence: N/A

MutationType: inframe_deletion

CivicName: F76del (c.227_229del)

MultipleGeneVariants: N/Av