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PubMed This is a summary of 20 peer-reviewed journal articles Updated
Pediatrics · VACTERL association

Ruling Out Other Conditions: Could it be something else?

At a Glance

When a baby is suspected of having VACTERL association, doctors must first rule out genetic syndromes with similar physical features. The most critical mimic to rule out is Fanconi Anemia, using a chromosome breakage test, because children with FA are highly sensitive to radiation and require specialized care.

When a baby is born with multiple physical differences, doctors often start with the label VACTERL association because they see a familiar pattern. However, because VACTERL is a “cluster” of symptoms rather than a single disease with one genetic cause, it can sometimes mimic more serious genetic syndromes [1][2].

Ruling out these mimics through genetic testing is a vital part of your child’s care. It ensures they receive the correct monitoring and that doctors avoid treatments that could be harmful to them [3][4].

The Critical “Rule Out”: Fanconi Anemia (FA)

The most important condition to rule out is Fanconi Anemia (FA). While VACTERL and FA share many physical features—such as thumb differences and kidney malformations—they are fundamentally different on a cellular level [5][6].

  • VACTERL is a structural “association.” It is like a glitch in the early physical building process of the body [2].
  • Fanconi Anemia is a DNA-repair disorder. Every cell in the body has trouble fixing its own DNA when it gets damaged [7].

Why the distinction matters:
If a child has Fanconi Anemia, their cells are extremely sensitive to things that damage DNA, such as radiation (from certain X-rays or CT scans) and certain types of medical treatments [3][4]. Additionally, children with FA require regular blood monitoring because they are at a very high risk for bone marrow failure and certain cancers later in life [8][9].

The Chromosome Breakage Test

To rule out FA, doctors must perform a specialized blood test called a Chromosome Breakage Study [1].

  1. The Process: A sample of your child’s blood is sent to a specialized lab.
  2. The “Stress Test”: Scientists expose the blood cells to chemicals called Mitomycin C (MMC) or Diepoxybutane (DEB) [10][11].
  3. The Result: Healthy cells can repair the damage from these chemicals. In Fanconi Anemia, the chromosomes will literally “break” or shatter because the cell’s repair machinery is broken [7][10].

Note: This test is the gold standard and is considered mandatory by specialists for many children suspected of having VACTERL [11].

Other Common Mimics

Your medical team will also look for clues of other genetic syndromes that overlap with VACTERL. Finding these often requires simple visual checks or standard genetic blood tests:

Syndrome Key “Clues” Not Usually Found in VACTERL Genetic Marker
CHARGE Syndrome Eye “colobomas” (notches in the colored part of the eye), specific ear shape differences, and balance issues [12][13]. CHD7 gene [14]
Townes-Brocks Ears with small skin tags or “pits,” and specific types of thumb and foot differences [1][15]. SALL1 gene [16]
Currarino Syndrome A triad of a sacral (lower spine) bone difference, a mass near the tailbone, and a narrowed anus [17][18]. MNX1 gene [19]

Why This is Empowering

Learning that your child needs more genetic tests can be exhausting and scary. However, this “detective work” is how you build the safest possible roadmap for their life. Finding a specific genetic cause (a syndrome) rather than an “association” gives your family a clearer picture of what to expect in the future and connects you to specialized support communities [1][20].

Common questions in this guide

Why is it important to rule out Fanconi Anemia if my baby has VACTERL features?
Fanconi Anemia is a DNA-repair disorder that looks physically similar to VACTERL but requires very different medical care. Children with Fanconi Anemia are extremely sensitive to DNA-damaging radiation from certain X-rays and CT scans, and they need specialized monitoring for bone marrow issues.
What is the chromosome breakage test?
The chromosome breakage study is a specialized blood test used to check if a child has Fanconi Anemia. Scientists expose the blood cells to specific chemicals to see if the cells can repair themselves; if the chromosomes shatter, it confirms the cell's repair machinery is broken.
Are there other syndromes that mimic VACTERL?
Yes, doctors will also look for signs of CHARGE Syndrome, Townes-Brocks, and Currarino Syndrome. These conditions often have distinct physical clues, such as unique ear shapes or eye differences, and can be confirmed with targeted genetic blood tests.
Is VACTERL a genetic syndrome?
VACTERL is considered a structural association rather than a single genetic syndrome with one cause. It acts more like a glitch in early fetal physical development, which is why doctors perform genetic testing to ensure a specific genetic disease isn't causing the symptoms.

Questions to Ask Your Doctor

Curated prompts to bring to your next appointment.

  1. 1.Has my child been given a chromosome breakage study (DEB or MMC test) to rule out Fanconi Anemia?
  2. 2.If my child needs surgery, does the medical team know their FA status in case they need post-operative care or future treatments?
  3. 3.Does my child have any 'major' features of CHARGE syndrome, like ear shape differences or eye colobomas?
  4. 4.Would a broad genetic test, like Whole Exome Sequencing, be more useful than testing for individual genes?
  5. 5.How would a diagnosis of a specific syndrome (like Townes-Brocks) change our long-term monitoring plan compared to VACTERL?

Questions For You

Tap a prompt to share your answer — we'll use it plus this page's context to start a tailored conversation.

References

References (20)
  1. 1

    Clinical Presentations and Diagnostic Imaging of VACTERL Association.

    Tonni G, Koçak Ç, Grisolia G, et al.

    Fetal and pediatric pathology 2023; (42(4)):651-674 doi:10.1080/15513815.2023.2206905.

    PMID: 37195727
  2. 2

    HSPA6: A new autosomal recessive candidate gene for the VATER/VACTERL malformation spectrum.

    Kause F, Zhang R, Ludwig M, et al.

    Birth defects research 2019; (111(10)):591-597 doi:10.1002/bdr2.1493.

    PMID: 30887706
  3. 3

    A rare case of Fanconi anemia with Mitomycin C sensitivity: A pediatrics case report.

    Bhatt V, Rohatgi S, Singh M

    Clinical case reports 2024; (12(4)):e8711 doi:10.1002/ccr3.8711.

    PMID: 38550724
  4. 4

    Therapeutic research in the crystal chromosome disease Fanconi anemia.

    Minguillón J, Surrallés J

    Mutation research. Genetic toxicology and environmental mutagenesis 2018; (836(Pt A)):104-108 doi:10.1016/j.mrgentox.2018.05.012.

    PMID: 30389152
  5. 5

    Novel FANCI mutations in Fanconi anemia with VACTERL association.

    Savage SA, Ballew BJ, Giri N, et al.

    American journal of medical genetics. Part A 2016; (170A(2)):386-391 doi:10.1002/ajmg.a.37461.

    PMID: 26590883
  6. 6

    Sonic Hedgehog, VACTERL, and Fanconi anemia: Pathogenetic connections and therapeutic implications.

    Lubinsky M

    American journal of medical genetics. Part A 2015; (167A(11)):2594-8 doi:10.1002/ajmg.a.37257.

    PMID: 26198446
  7. 7

    Chromosome Instability in Fanconi Anemia: From Breaks to Phenotypic Consequences.

    García-de-Teresa B, Rodríguez A, Frias S

    Genes 2020; (11(12)) doi:10.3390/genes11121528.

    PMID: 33371494
  8. 8

    Myelodysplastic Syndrome, Acute Myeloid Leukemia, and Cancer Surveillance in Fanconi Anemia.

    Savage SA, Walsh MF

    Hematology/oncology clinics of North America 2018; (32(4)):657-668 doi:10.1016/j.hoc.2018.04.002.

    PMID: 30047418
  9. 9

    Cancer in the National Cancer Institute inherited bone marrow failure syndrome cohort after fifteen years of follow-up.

    Alter BP, Giri N, Savage SA, Rosenberg PS

    Haematologica 2018; (103(1)):30-39 doi:10.3324/haematol.2017.178111.

    PMID: 29051281
  10. 10

    Diagnosing Fanconi Anemia: A Rare Case Report From Rural India.

    Malik A

    Cureus 2024; (16(6)):e63381 doi:10.7759/cureus.63381.

    PMID: 39077270
  11. 11

    An experience with 124 cases of fanconi anemia: clinical spectrum, hematological parameters and chromosomal breakage analysis.

    Mahmood R, Mahmood A, Khan SA, Jaffar R

    American journal of blood research 2021; (11(5)):498-503.

    PMID: 34824882
  12. 12

    Detailed analysis of inner ear malformations in CHARGE syndrome patients - correlation with audiological results and proposal for computed tomography scans evaluation methodology.

    Szleper A, Lachowska M, Wojciechowski T, Pronicka-Iwanicka K

    Brazilian journal of otorhinolaryngology 2024; (90(2)):101383 doi:10.1016/j.bjorl.2023.101383.

    PMID: 38219448
  13. 13

    CHARGE syndrome with early fetal ear abnormalities: A case report.

    Liang Y, He S, Yang L, et al.

    Clinical case reports 2024; (12(3)):e8670 doi:10.1002/ccr3.8670.

    PMID: 38505478
  14. 14

    Congenital hyperinsulinism in an individual with CHARGE syndrome and a pathogenic CHD7 variant.

    Ibeas C, Giraudo F, Männistö JME, et al.

    JCEM case reports 2026; (4(3)):luag016 doi:10.1210/jcemcr/luag016.

    PMID: 41743177
  15. 15

    Adult diagnosis of Townes-Brocks syndrome with renal failure: Two related cases and review of literature.

    Beaudoux O, Lebre AS, Doco Fenzy M, et al.

    American journal of medical genetics. Part A 2021; (185(3)):937-944 doi:10.1002/ajmg.a.62050.

    PMID: 33438842
  16. 16

    A novel SALL1 C757T mutation in a Chinese family causes a rare disease --Townes-Brocks syndrome.

    Chi Y, Yao Y, Sun F, et al.

    Italian journal of pediatrics 2024; (50(1)):121 doi:10.1186/s13052-024-01691-0.

    PMID: 38915054
  17. 17

    Peripartum Diagnosis of Currarino Syndrome With Anterior Sacral Meningocele: A Case Report.

    Neumann KE, Pappas H, McCrory EH

    A&A practice 2021; (15(8)):e01506 doi:10.1213/XAA.0000000000001506.

    PMID: 34347635
  18. 18

    Characterization of complete Currarino syndrome in pediatrics-a comparison between CT and MRI.

    Chen J, Zheng N, Wang C, et al.

    Annals of translational medicine 2022; (10(2)):63 doi:10.21037/atm-21-6572.

    PMID: 35282111
  19. 19

    Currarino Syndrome in Two Moroccan Siblings with Inherited 7q36 Deletion due to Maternal t(7;21)(q36;p11)mat: A Case Report.

    El Amrani Z, Natiq A, Sbiti A, et al.

    Molecular syndromology 2024; (15(2)):125-129 doi:10.1159/000534432.

    PMID: 38585544
  20. 20

    Outcomes of kidney transplants in pediatric patients with the vertebral defects, anal atresia, cardiac defects, tracheoesophageal fistula, renal anomalies, limb abnormalities association.

    Diaz J, Chavers B, Chinnakotla S, Verghese P

    Pediatric transplantation 2019; (23(2)):e13341 doi:10.1111/petr.13341.

    PMID: 30597716

This page provides educational information about diagnosing VACTERL association and ruling out other genetic conditions. Always consult a pediatric geneticist or your child's medical team to interpret specific test results and create a safe care plan.

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