Case3: Male, 24 yrs onset, China, Asian

DiseaseAssertion: Arrhythmogenic Cardiomyopathy

FamilyInfo: 62 yr old mother and 37 yr old sister carry both the variants but do not have ACM phenotype (See Figure 3)

CasePresentingHPOs: HP:0001638, HP:0011675, HP:0004756, HP:0006682, HP:0025074, HP:0001279, HP:0001645 (Cardiomyopathy, Arrhythmia, Ventricular tachycardia, Ventricular extrasystoles, Abnormal QRS complex, Syncope, Sudden cardiac death)

HPOsFreeText: Task force score of 6, Regional right ventricular dyskinesia, PLAX RVOT is 36 mm, 59,065 VES / 24 h, LVEF of 58%, LVEDD at 46 mm, IVS at 8 mm, Epsilon wave in V1–3

CaseNotHPOs: HP:0001639, HP:0001711 (Hypertrophic cardiomyopathy, Abnormal morphology of the left ventricle)

NotHPOsFreeText: Repolarization abnormalities

CasePreviousTesting: Tested genes include MYH7, MYBPC3, TNNT2, TNNI3, TPM1, ACTC1, TTN, TCAP, ACTN2, LDB3, MYH6, TNNC1, MYPN and NEBL.

CaseGenotypingMethod: The coding sequences of 15 genes were directly captured and sequenced. Candidate variants were then filtered by pathogenicity and confirmed via sanger sequencing. Family members were tested via Sanger sequencing afterwards.

CaseAddInfo: Proband is heterozygous for both variants

Variant: NM_000257.3:c.3134G>A (p.Arg1045His)

CAID: CA035801 http://reg.clinicalgenome.org/redmine/projects/registry/genboree_registry/allele?hgvsOrDescriptor=NM_000257.3%3Ac.3134G%3EA

gnomAD: 0.0002005, http://gnomad.broadinstitute.org/variant/14-23891500-C-T

Multiple Gene Variants

(1) PKP2 Variant

Variant: NM_004572.3:c.2146delA (p.Met716Cysfs*30)

CAID: CA915940300 http://reg.clinicalgenome.org/redmine/projects/registry/genboree_registry/by_caid?caid=CA915940300

gnomAD: Not in gnomAD