PMID:39967245

Gene: ABCA4

HGNC ID: 34

Case#:39 man

DiseaseAssertion:NA

FamilyInfo:NA

CasePresentingHPOs:Snellen in both eye, visual impairment with night blindnessisual acuity was 20/20Snellen in both eyes, with a minor correction for astig-matism. The anterior segment and intraocular pressurewere within normal limits. On fundus examination, dif-fuse fleck-like lesions were scattered both inside and out-side the arcades, while sharply demarcated areas ofmacular atrophy with foveal sparing, more pronouncedin the left eye, were visible.

CaseHPOFreeText:NA

CaseNotHPOs:NA

CaseNotHPOFreeText:

Genotyping Method:Next-Generation Sequencing (NGS), using theTruSight One Clinical Exome sequencing panel on anIllumina NexSeq500 platform, enriching for 4800 genesincluding ABCA4, CNGB3, ELOVL4, PROM1, and PRPH2

PreviouslyPublished:Under refernces?

Variant:WDR19 variants:the novel deletion at c.1777 + 1 within the donor splicingsite (class 4) and the rare c.1430 G>T variant causing theamino-acid substitution p.(Arg477Leu) (class 3) in the putative protein. Additionally, a heterozygous c.1793A>G(class 3) variant in the CDH23 gene was found, though it was deemed as not contributive to the patient’s clinical phenotype. All reported variants were confirmed throughSanger sequencing

ClinVar:NA

CAID:NA

SupplementalData:NA

Case#: Family 12 Proband, male, 43yo at onset, Portuguese

DiseaseAssertion: Stargardt

FamilyInfo: no affected family members in pedigree (Fig. 1)

CasePresentingHPOs: HP:0007663

CaseHPOFreeText: "The criteria for STGD phenotype included bilateral central vision loss and pigmentary macular lesions, normal caliber of retinal vessels, absence of pigmented bone spicules, and compatibility with recessive mode of inheritance." Moderate central retinal changes, decreased mfERG responses exclusively in the central 15 degrees

CaseNotHPOs:

CaseNotHPOFreeText:

PreviouslyPublished: n/a

Variant: p.Glu1574X; p.Val931Met. Several other polymorphisms also reported. ABCR400 gene chip microarray, DHPLC

ClinVar: 1460063

CAID: CA341283936

SupplementalData: n/a

It is known that patients harbouring p.(Gly1961Glu) or p.(Asn1868Ile) allele share some common clinical characteristics and present with a milder disease phenotype than patients carrying other alleles. A typical feature of patients with p.(Gly1961Glu) is BEM, which is otherwise present in around 20% of all STGD1 patients.

ABCA4 variant revealed but not target of research and doesn't seem to amount to anything Variantc.3113C>T p.(Ala1038Val)

Annotating here since the full text is a PDF.

Case#: Family AR321 proband, US, 6yo at onset

DiseaseAssertion: Stargardt

FamilyInfo: proband and two other siblings are affected

CasePresentingHPOs: The essential and defining features of STGD were (1) pedigrees with at least one living affected individual compatible with autosomal recessive inheritance; (2) an ophthalmoscopically characteristic retinal disorder in families with both parents living; (3) bilateral central visual loss with both “beaten metal” elliptical foveal dystrophy and temporal pallor of the optic discs, documented by retinal color photography, with or without yellow-pigment epithelial flecks in the macular and/or retinal “near periphery”; and (4) the characteristic fluorescein angiographic feature of a dark choroid (Blacharski 1988).

CaseHPOFreeText:

CaseNotHPOs:

CaseNotHPOFreeText: (1) evidence of autosomal dominant inheritance; (2) any history of night blindness, loss of peripheral vision, or "retinitis pigmentosa"; (3) cataracta complicata or cells in the vitreous; (4) substantially abnormal electroretinographic or electrooculographic responses; (5) no fluorescein angiography performed or no dark choroid documented; (6) neurological disease (including loss of cognition or seizures); 7) drug exposures (especially to antimalarial and agents known to cause crystalline retinopathies); or (8) any "atypical" maculopathies in which a unique diagnosis of STGD could not be established.

PreviouslyPublished: PMID: 8533764

Variant: c.3113C>T p.A1038V; c.1715G>C p.R572P . Heteroduplex and SSCP analyses were used to screen the 50 exons of ABCA4. Linkage analysis and haplotype analysis were previously performed

ClinVar: 99073

CAID: CA226919

SupplementalData: n/a

Case#: Bryant Subject JB260, US

DiseaseAssertion: Stargardt

FamilyInfo:

CasePresentingHPOs: "Stargardt disease is a childhood-onset macular degeneration and is most commonly caused by mutations in ABCA4. Characteristic yellow flecks are typically seen under the macula during a fundus exam."

CaseHPOFreeText:

CaseNotHPOs:

CaseNotHPOFreeText:

GenotypingMethod: WES; previously screened using arrayed primer extension (APEX) multigene panels for the relevant disease and no disease-causing variants had been identified; PCR and Sanger for verification

PreviouslyPublished: n/a

Variant: c.6119G>A p.Arg2040Gln; c.2879del p.Ala960Aspfs*17

CAID: CA232815

SupplementalData:

Case#: Patients were identified from the inherited retinal disease (IRD) database at UC San Diego (UCSD).

DiseaseAssertion: RP with macular edema

FamilyInfo:

CasePresentingHPOs:

CaseHPOFreeText: Dx of RP based on "a history of progressive peripheral vision loss or nyctalopia, and ocular examination findings of RP including bone spicule pigmentation, disc pallor and attenuated vessels and genetic confirmation."

CaseNotHPOs:

CaseNotHPOFreeText:

GenotypingMethod: Next-generation sequencing (NGS), exome sequencing, and/or targeted Sanger sequencing were the primary genetic testing approaches.

PreviouslyPublished: PMID:10206579 is referenced but it seems a reference to the variant and not the proband

Variant: c.6383A>G (p.His2128Arg); c.3G>T (p.Met1?). phase unknown

ClinVar: 99455

CAID: CA227399

SupplementalData: Variant is found in table S2