Case#: Case 4, Sex: Female, Age:34

DiseaseAssertion: STGD

FamilyInfo: n/a

CasePresentingHPOs: n/a

CaseHPOFreeText: Text mentions BCVA 20/100 in both eyes later became 20/240. Bilateral atrophic-appearing foveal lesions associated with yellowish-white fundus flecks at the posterior pole. Subnormal scotopic and photopic responses. Subretinal fibrosis in left eye. Hypofluorescence due to hyperplasia of RPE in left eye.

CaseNotHPOs:n/a

CaseNotHPOFreeText: No ocular trauma.

Genotyping Method: genetic analysis

PreviouslyPublished: n/a

Variant: Variant is a heterozygous mutation given as NM_000350.3(ABCA4):c.3113C>T (p.Ala1038Val)

ClinVar: Variation ID: 7894

CAID: CA119135

SupplementalData: n/a

Case#: German/British, 76

DiseaseAssertion: EOSRD

FamilyInfo: Grandparents from Germany and the United Kingdom

CasePresentingHPOs: HP:0007401, HP:0007913

CaseHPOFreeText: Macular atrophy and pigmentation, peripheral pigmentation, early-onset severe retinal dystrophy

CaseNotHPOs: N/a

CaseNotHPOFreeText: N/a

Genotyping Method: BGISeq-500 2 x 100-bp paired-end module, Burrows-Wheeler Aligner and Genome Analysis Tooklit HaploptypeCaller

PreviouslyPublished: n/a

Variant: c.1622T>C, c.4326C>A, and c.3113C>T

ClinVar: 99067, 417991, 7894

CAID: CA226911, CA957653, CA119135

SupplementalData: The c.1622T>C variants and c.3133C>T are thought to be same gene copy

Case#: Patient female, 48y, ethnicity not reported

DiseaseAssertion: Stargardt disease (STGD1) with unusual phenotype resembling pattern dystrophy

FamilyInfo: autosomal recessive inheritance; segregation analysis confirms each parent carries one variant (heterozygous). Pedigree shown in Figure 3. Proband is compound heterozygous for ABCA4 variants.

CasePresentingHPOs: HP:0007663, HP:0007754, HP:0030636, HP:0000548

CaseHPOFreeText: mild visual impairment (BCVA 20/25 and 20/20), perifoveal yellow fleck-like lesions, hyperautofluorescent lesions with lipofuscin accumulation, foveal sparing, subretinal material accumulation, phenotype resembling pattern dystrophy, bilateral macular involvement, decreased p50 values on pattern ERG

CaseNotHPOs: HP:0000510 (normal ERG responses except pattern ERG component)

CaseNotHPOFreeText: normal full-field ERG (scotopic and photopic responses), normal electrooculography, preserved outer retina structure, minimal photoreceptor disruption at fovea

Genotyping Method: targeted next-generation sequencing (Illumina NextSeq500) with SeqCap EZ enrichment panel; Sanger sequencing used for confirmation and segregation analysis

PreviouslyPublished: n/a

Variant: ABCA4 NM_000350.2: c.428C>T (p.Pro143Leu); c.3113C>T (p.Ala1038Val)

ClinVar: 99273; 7894

CAID: n/a

SupplementalData: clinical imaging and genetic/segregation data in supplemental data (Figures 1–3, Table 1)