Brochure · by 4bases

KaryoSolver

The Next Generation of Karyogenomics via Low-Pass Whole Genome Sequencing

Turnaround < 24hRapid same-day reporting
~50 kb ResolutionHigh-precision CNV & ROH calls
Data PrivacyBAM file local preprocessing
01 — Key diagnostic detection capabilities

KaryoSolver represents a paradigm shift in molecular cytogenomics, replacing conventional karyotyping technologies with uniform low-pass whole genome sequencing.

Key diagnostic detection capabilities:

Aneuploidies

Detects genome-wide numerical abnormalities and whole-chromosome gains/losses.

Segmental CNVs

Detects deletions and duplications down to ~50 kb across all autosomes & sex chromosomes.

Balanced Translocations

Detects chromosomal rearrangements that do not result in a net gain or loss of genetic material.

Mosaicism

Identifies mosaic CNVs and low-level numerical alterations at moderate fractions (> 10%).

ROH

Detects Loss of Heterozygosity (LOH) and Regions of Homozygosity for UPD & consanguinity.

All-in-one solution

aCGH, SNP ARRAYS
& OGM
»
LOW-PASS WGS
+
KaryoSolver
Array CGHSNP ArrayOGMKaryoSolver
Core MechanismDual-color hybridizationAllele-specific hybridizationDirect imaging of UHMWLow-Pass WGS
DNA Input RequiredHigh (>500 ng)Medium (>100 ng)High (~750 ng)Ultra-low (≥ 50 ng)
Sample FlexibilityBlood, Amniotic Fluid, CVSHigh-quality DNAUHMW DNABlood, Amniotic fluid, CVS, WGA
CNV Resolution~100 - 200 kb~50 - 100 kb~100 - 200 kb~50 kb
LOH / UPD DetectionNoYesLimitedYes
Structural Variant DetectionNo balanced SVsNo balanced SVsYesYes
02 — Clinical applications

Clinical applications

Prenatal diagnostics

  • Chromosomal microarray analysis (CMA)
  • Regions of Homozygosity (ROH) and Uniparental Disomy (UPD) investigation
  • Product of Conception (POC) analysis, i.e. PGT
Validated for:
  • Chorionic villi
  • Body fluids (amniotic fluid),
  • tissues (foetal abortion tissue)
  • Whole Genome Amplification (WGA)

Postnatal / Constitutional

  • Developmental Delay (DD)
  • Intellectual Disability (ID)
  • Autism Spectrum Disorder (ASD)
  • Multiple congenital anomalies
Validated for:
  • Peripheral Blood

Cancer genomics

  • Chromosomal copy-number alteration
  • Loss of Heterozygosity (LOH) investigation
  • Mosaicism and clonal architecture assessment
Validated for:
  • Peripheral Blood
  • Bone Marrow
Clinical ApplicationTypical IndicationCNV Scale
PGT (A/SR)Embryo screeningWhole-chr & large segmental
Prenatal (Large)Abnormal ultrasound, positive NIPTWhole-chr & large CNVs
Prenatal (Recurrent)Syndromic fetal anomaliesRecurrent CNVs
Postnatal (Standard)DD, ID, ASD, ADHD, EpilepsyPathogenic CNVs
Postnatal (Congenital)CHD, syndromic phenotypeLarge syndromic CNVs
Cancer (Large)MDS, AML, MPNCNVs and aneuploidies
Cancer (Recurrent)Known risk regionsRecurrent deletions
03 — Integrated 4bases Workflow

KaryoSolver is a NGS-based solution that redefines molecular karyotyping, combining the lyophilized KaryoPrep library preparation with a dedicated, purpose-built data analysis pipeline.

Phase 1 • Wet lab

KaryoPrep

NGS library preparation in less than 2 hours of hands-on time.

Features 100% lyophilized reagents for maximum stability without cold-chain constraints.

Phase 2 • Privacy & data

KaryoCompanion

Secure on-premise software for BAM file preprocessing.

Guarantees complete clinical sample anonymization and strict compliance with global data privacy standards.

Phase 3 • Bioinformatic analyses

KaryoSolver

Automated CNV/ROH segmentation.

Integrated with ClinGen/ACMG databases to generate standardized, ISCN-compliant diagnostic reports.

1. From gDNA
2. KaryoPrep
3. Nanoadapter
4. Sequencing
5. Local BAM pre-processing
6. to FINAL DATA

lpWGS Performance & Throughput

ResolutionDetection capabilitySamples/ PromethionSamples/ MiniON
~ 5MbLarge CNVs> 96 samples72 samples
~ 1MbCNVs96 samples16 samples
~ 500kbCNVs72 samples12 samples
~ 200kbHigh-resolution CNVs48 samples8 samples
~ 100kbHigh-resolution CNVs24 samples4 samples
~ 50kbUltra-high-resolution CNVs16 samples2 samples
ROHLOH, UPD16 samples2 samples
Balanced SVsBalanced structural variants4 samples-
04 — Case studies

Constitutional CNVs: from genomic imbalance to clinical interpretation.

Case 1

Wolf-Hirschhorn syndrome with chromosomes deletions and duplications

KaryoSolver CNV table and Log2R plot for Wolf-Hirschhorn syndrome

KaryoSolver highlights the pathogenic 4p deletion directly in the CNV profile and links the finding to genomic coordinates and annotation. The visual pattern makes the clinically relevant imbalance easy to recognize and supports a rapid interpretation consistent with Wolf–Hirschhorn syndrome.

Case 2

Turner syndrome — pattern consistent with isochromosome Xq

KaryoSolver CNV table and Log2R plot showing X chromosome loss and gain

How to read the pattern

Xp22.33–p11.21: CN = 1loss of the short arm (Xp)
+
Xp11.21–q28: CN = 3gain of most of the long arm (Xq)
The complementary loss + gain pattern is consistent with an i(Xq): one normal X plus an isochromosome composed of two Xq arms.

ROH, UPD and consanguinity: adding allelic information to CNV analysis

Case 3

Consanguinity

KaryoSolver ROH view showing a large homozygous region on chromosome 2

Example shown: a large ROH on chromosome 2 can be immediately visualized, quantified and reviewed in the appropriate clinical context.

KaryoSolver detects extended regions of homozygosity (ROH) across the genome. Their size, distribution and chromosome specificity help the laboratory decide whether the pattern is more suggestive of parental relatedness or whether a chromosome-specific event should be evaluated for possible uniparental disomy.

Detect

Identify long homozygous segments from SNP information.

Put in context

Assess whether ROH are distributed across multiple chromosomes or concentrated on one chromosome.

Support interpretation

Use the pattern to guide follow-up for consanguinity, UPD or recessive-disease investigation.

Onco-hematology: CNVs and balanced rearrangements in one view

Case 4A

Onco - hematological CNVs & Cellular fraction

CNV table for a multiple myeloma sample
Genome-wide plot with multiple mosaic gains and losses

Visualize multiple CNVs and their cellular fractions in a single genomic profile, providing an immediate view of the complex and heterogeneous copy-number landscape of multiple myeloma. Example: multiple mosaic gains and losses occurring at different cellular fractions, highlighting the presence of clonal and subclonal genomic alterations.

Case 4B

Balanced translocations and complex rearrangements

Circos plot revealing chromosomal rearrangements

Identify complex genomic rearrangements, including balanced translocations, and gain a comprehensive view of structural alterations in onco-hematological samples.

Example:
Circos plot revealing multiple chromosomal rearrangements and balanced translocations

One platform. A clearer view of the genome.

KaryoSolver transforms array and NGS data into clinically meaningful insights, supporting the detection and interpretation of CNVs, ROH and complex genomic rearrangements in a single, intuitive workflow.

Interested in learning more?

Contact our experts for further information or to request a personalized demo of KaryoSolver: Email address (image)

Contact Information
4bases SA — c/o Tecnopolo Ticino
Via Cantonale n° 18, CH-6928 Manno, Switzerland
Email address (image)
Discover more at 4bases.ch
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