WES vs WGS: Which is More Suitable?
Key differences, advantages and disadvantages between Whole Exome and Whole Genome Sequencing
What Is the Difference Between WES and WGS?
WES (Whole Exome Sequencing) and WGS (Whole Genome Sequencing) are two advanced NGS (Next-Generation Sequencing) methods used in the diagnosis of genetic diseases. Both read DNA, but they differ significantly in scope, cost, and interpretation.
| Feature | WES (Whole Exome) | WGS (Whole Genome) |
|---|---|---|
| Target Region | Protein kodlayan bölgeler (~%1-2) | Tüm genom (~%100) |
| Base Pairs | ~40 milyon | ~3 milyar |
| Disease Variant Coverage | %85 | %97+ |
| Duration | 4-6 hafta | 6-10 hafta |
| Maliyet | ✓ Lower | ↗ Yüksek |
| Yorumlama | ✓ Kolay | ↗ Higher |
| Veri Depolama | ~1 GB | ~100 GB |
| Regulatory Regions | Hayır | ✓ Evet |
| First choice (most cases) | ✓ Evet | Seçimlik |
Which Test to Choose When?
When WES Is Preferred
- Undiagnosed patients with suspected rare disease
- Developmental delay and intellectual disability
- Multipl konjenital anomaliler
- ACMG secondary findings screening
- Situations requiring fast and economical solution
When WGS May Be Considered
- WES negative but clinical suspicion persists
- Suspected regulatory variants in non-coding regions
- Homozigotite haritalama gibi ileri analiz gereksinimi
- Need for comprehensive structural variant (SV) detection
Recommendation: Çoğu klinik durumda WES ilk tercih edilen testtir. WES negatif çıktığında ve klinik bulgular genetik bir nedeni güçlü şekilde destekliyorsa, WGS düşünülebilir. Omega Genetik'te her iki test için de danışmanlık hizmeti mevcuttur.
Hangi Test Size Uygun?
Our expert genetic counselors can help you determine the most suitable test.