AC

Clinical Area · Rare Disease

Ending the diagnostic odyssey with genomic precision

Many patients with rare or undiagnosed disease go years without a molecular explanation. Whole exome and genome sequencing, combined with expert variant interpretation, offer the most comprehensive available diagnostic pathway — often after other approaches have been exhausted.

Whole exome sequencing (WES)

Sequences the protein-coding regions of the genome — where approximately 85% of known disease-causing variants are found. Available as proband-only or trio (patient + both parents) for enhanced diagnostic yield.

Whole genome sequencing (WGS)

Covers the entire genome including non-coding regions and structural variants. Used when WES has been uninformative or when a non-coding or structural cause is suspected.

Targeted rare disease testing

For specific clinical suspicions: SMA (SMN1/SMN2 MLPA), Fragile X (FMR1 repeat expansion), Sanger-based familial variant confirmation, and other focused assays.

Clinical indications

When to consider rare disease genomic testing

Suspected monogenic disease without a clinical diagnosis despite prior evaluation

Multiple congenital anomalies or a complex phenotype not explained by standard workup

Pediatric neurological deterioration or regression of unknown etiology

Intellectual disability or developmental delay — especially with dysmorphic features

Family history of a suspected hereditary condition — proband-first evaluation

Prior inconclusive testing (targeted panels, karyotype, array) — exome or genome as next step

Available tests

Rare disease tests through AC

3billion

DGS — Proband

Diagnostic genome sequencing for a proband with suspected rare or undiagnosed genetic disease.

Method: NGS

Specimen: EDTA whole blood

TAT: ~65 days

3billion

DGS — Trio

Trio-based diagnostic genome sequencing for rare disease evaluation.

Method: NGS

Specimen: EDTA whole blood

TAT: ~65 days

AC Network

Family Test (Sanger)

Targeted familial variant testing using Sanger sequencing.

Method: Sanger

Specimen: EDTA whole blood / amniotic fluid

AC Network

Fragile-X Screening

FMR1 repeat-expansion screening for Fragile X syndrome indications.

Method: Fragment analysis

Specimen: EDTA whole blood

TAT: ~12 days

AC Network

SMA — SMN1/SMN2 del/dup (MLPA)

SMN1/SMN2 dosage analysis for spinal muscular atrophy.

Method: MLPA

Specimen: EDTA whole blood

TAT: 21–30 days

3billion

WES — Proband (3 Billion)

Whole exome sequencing for a proband with suspected rare genetic disease.

Method: NGS

Specimen: EDTA whole blood

TAT: ~30 days

GC Genome

WES — Proband (GC Genome)

Whole exome sequencing through GC Genome for proband-only evaluation.

Method: NGS

Specimen: EDTA whole blood

TAT: ~30 days

GC Genome

WES — Trio (GC Genome)

Trio whole exome sequencing through GC Genome.

Method: NGS

Specimen: EDTA whole blood

TAT: ~30 days

3billion

Whole Genome Sequencing (3 Billion)

Whole genome sequencing for broad rare disease assessment.

Method: NGS

Specimen: EDTA whole blood

TAT: ~30 days

Rare disease

Start with the clinical picture

Share the phenotype, prior testing history, and available specimen. AC can help identify the most appropriate sequencing strategy and navigate the logistics.

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