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PubMed This is a summary of 18 peer-reviewed journal articles Updated
Pediatric Surgery

Validation & Orientation: Understanding the Currarino Triad

At a Glance

Currarino syndrome is a rare genetic condition linked to the MNX1 gene. It is defined by a triad of features: a sacral bone defect, an anorectal malformation, and a presacral mass. Because symptoms vary widely, an MRI and a multidisciplinary team are crucial for proper diagnosis and management.

Receiving a diagnosis of Currarino syndrome can bring a complicated mix of emotions. For many, it is the end of a long search for answers regarding severe, lifelong constipation or complex physical findings at birth [1][2]. While it is a rare condition, understanding its components and its genetic nature is the first step in organizing a clear path forward for your or your child’s care.

The Three Parts of the Currarino Triad

Currarino syndrome is defined by a “triad”—a group of three specific medical findings that often occur together. While not every person will have all three, the combination is the hallmark of the condition [3][4].

  1. Sacral Bone Defects (Scimitar Sacrum): This is an abnormality in the sacrum (the shield-shaped bone at the base of the spine). In many patients, the bone is shaped like a curved sword, which is why it is often called a scimitar sacrum [3][5].
  2. Anorectal Malformations (ARM): These are structural issues with the anus or rectum. It may present as anal stenosis (a narrowing of the anal opening) or other forms of malformation that make it difficult for stool to pass, often leading to severe, chronic constipation from birth [3][6][7].
  3. Presacral Mass: This is a growth or “mass” located in the space in front of the sacrum. These are typically non-cancerous but require careful management. Common types include an anterior sacral meningocele (a fluid-filled sac connected to the spinal canal), a teratoma (a type of germ cell tumor), or a dermoid cyst [3][5][8].

Clinical Variety: The Complete vs. Incomplete Triad

Currarino syndrome is a “spectrum disorder,” meaning it affects everyone differently. Doctors often categorize the condition into three subtypes based on which parts of the triad are present [4][9]:

  • Complete Triad: The individual has all three findings: the sacral defect, the anorectal malformation, and the presacral mass [4].
  • Incomplete/Mild Triad: Only two of the three components are present [4].
  • Minimal/Asymptomatic: The individual may have only the sacral bone defect and may show no symptoms at all, or only very mild ones [4][9].

Because of this variety, it is common for a parent to be diagnosed only after their child is found to have the condition. A parent might have had mild constipation their whole life without knowing there was a structural reason for it [10][11].

Understanding the Genetic Connection

Currarino syndrome is a genetic condition, primarily linked to mutations in the MNX1 gene (located on chromosome 7q36) [3][12].

  • Autosomal Dominant Inheritance: This means a person only needs one copy of the mutated gene to have the condition. A parent with the mutation has a 50% chance of passing it to each child [12][11].
  • Variable Expressivity: Even within the same family, the severity can vary wildly. One family member might have life-threatening complications, while another has no symptoms at all, even though they carry the exact same genetic mutation [13][14].
  • Reduced Penetrance: Not everyone who carries the mutation will show physical signs of the syndrome [9].

Diagnosis and Next Steps

Because Currarino syndrome involves the spine, the digestive tract, and potentially the nervous system, Magnetic Resonance Imaging (MRI) is the gold-standard tool for diagnosis [15][16]. It allows doctors to see the presacral mass clearly and check for related issues like a tethered cord (where the spinal cord is abnormally attached to the surrounding tissues) [15][17].

Management usually requires a multidisciplinary team—a group of specialists working together, including pediatric surgeons, neurosurgeons, and geneticists—to tailor a plan based on the specific symptoms present [15][18]. Finding this answer is a significant milestone that allows your care team to stop treating individual symptoms and start managing the condition as a whole. To understand more about what to expect over time, visit the Symptoms & Warning Signs page.

Common questions in this guide

What are the three parts of the Currarino triad?
The triad consists of three specific medical findings: a sacral bone defect (often called a scimitar sacrum), an anorectal malformation (like anal stenosis), and a presacral mass. While these are the hallmark features, not everyone with the syndrome will have all three.
Can I have Currarino syndrome if I don't have all the symptoms?
Yes, Currarino syndrome is a spectrum disorder. You can have an incomplete triad with only two of the three components, or you might be mostly asymptomatic with just a sacral bone defect and very mild symptoms.
How is Currarino syndrome inherited?
It is an autosomal dominant genetic condition, primarily linked to mutations in the MNX1 gene. This means a parent with the mutation has a 50% chance of passing it to each child. However, the severity of symptoms can vary wildly even within the same family.
What is the best test to diagnose Currarino syndrome?
An MRI is considered the gold-standard diagnostic tool for this condition. It allows specialists to clearly see the presacral mass, examine the spine, and check for related neurological issues like a tethered spinal cord.
Should my family members get genetic testing for the MNX1 mutation?
Because the condition can be inherited and some family members may have hidden structural issues with no obvious symptoms, your doctor may recommend genetic testing and screening for relatives to ensure any hidden complications are identified and managed early.

Questions to Ask Your Doctor

Curated prompts to bring to your next appointment.

  1. 1.Has an MRI been performed to check for all three parts of the triad, specifically a presacral mass or tethered cord?
  2. 2.Should our family members undergo genetic testing for the MNX1 mutation, even if they don't have symptoms?
  3. 3.How does the presence of an 'incomplete' triad change the long-term monitoring or treatment plan?
  4. 4.What specialists (such as neurosurgeons or gastroenterologists) will be part of the multidisciplinary care team?
  5. 5.Are there specific risks, such as meningitis or urinary issues, that we should be watching for?

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 (18)
  1. 1

    Treatment Strategy for Currarino Syndrome Complicated With Anorectal Stenosis.

    Harada A, Tomita H, Tsukizaki A, et al.

    Cureus 2023; (15(12)):e50512 doi:10.7759/cureus.50512.

    PMID: 38226073
  2. 2

    Fatal Meningitis in a 14-Month-Old with Currarino Triad.

    Al Qahtani HM, Suliman Aljoqiman K, Arabi H, et al.

    Case reports in radiology 2016; (2016()):1346895 doi:10.1155/2016/1346895.

    PMID: 27597920
  3. 3

    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
  4. 4

    Currarino syndrome: does the presence of a genetic anomaly correlate with a more severe phenotype? A multicentre study.

    Costanzo S, Spaccini L, Pio L, et al.

    Journal of pediatric surgery 2017; (52(10)):1591-1596 doi:10.1016/j.jpedsurg.2017.06.012.

    PMID: 28689883
  5. 5

    Currarino Syndrome in a Fetus, Infant, Child, and Adolescent: Spectrum of Clinical Presentations and Imaging Findings.

    Caro-Domínguez P, Bass J, Hurteau-Miller J

    Canadian Association of Radiologists journal = Journal l'Association canadienne des radiologistes 2017; (68(1)):90-95 doi:10.1016/j.carj.2016.05.007.

    PMID: 27887934
  6. 6

    Recurrent Abortion and Tethered Cord Syndrome Caused by Anterior Sacral Meningocele: A Report of a Rare Case with a Review of the Literature.

    Gupta S, Chunnilal J, Mehrotra M, et al.

    World neurosurgery 2017; (101()):815.e5-815.e7 doi:10.1016/j.wneu.2017.02.112.

    PMID: 28279771
  7. 7

    [A Surgical Case of Currarino Syndrome with Syringomyelia].

    Nemoto T, Ochiai J, Oku S, et al.

    Brain and nerve = Shinkei kenkyu no shinpo 2023; (75(8)):971-976 doi:10.11477/mf.1416202452.

    PMID: 37537744
  8. 8

    Complete Currarino Triad Presenting With Chronic Constipation.

    Aldabbab HY, Al Ghadeer HA, Alnosair AA, et al.

    Cureus 2022; (14(4)):e23743 doi:10.7759/cureus.23743.

    PMID: 35509736
  9. 9

    The first case of mosaic MNX1 mutation in an adult female with features of Currarino syndrome.

    Romano F, De Marco P, Ognibene M, et al.

    Birth defects research 2021; (113(15)):1161-1165 doi:10.1002/bdr2.1936.

    PMID: 34156759
  10. 10

    Currarino syndrome - a pre and post natal diagnosis correlation: case report and literature review.

    Ferreira C, Santos AP, Fonseca J

    The journal of maternal-fetal & neonatal medicine : the official journal of the European Association of Perinatal Medicine, the Federation of Asia and Oceania Perinatal Societies, the International Society of Perinatal Obstetricians 2022; (35(25)):5224-5226 doi:10.1080/14767058.2021.1876021.

    PMID: 33618589
  11. 11

    Sacrum agenesis and scimitar sacrum in Currarino syndrome.

    Corrêa DG, Daltro PA

    Child's nervous system : ChNS : official journal of the International Society for Pediatric Neurosurgery 2020; (36(7)):1337-1338 doi:10.1007/s00381-020-04653-z.

    PMID: 32447453
  12. 12

    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
  13. 13

    Clinical Diversity in Currarino Syndrome: Insights From Monozygotic Twins and a Single-Center Retrospective Study.

    Wang X, Min L, Bao L, et al.

    Congenital anomalies 2026; (66(1)):e70046 doi:10.1002/cga.70046.

    PMID: 41871837
  14. 14

    MNX1 mutations causing neonatal diabetes: Review of the literature and report of a case with extra-pancreatic congenital defects presenting in severe diabetic ketoacidosis.

    Aly HH, De Franco E, Flanagan SE, Elhenawy YI

    Journal of diabetes investigation 2023; (14(4)):516-521 doi:10.1111/jdi.13968.

    PMID: 36586106
  15. 15

    Atypical presentation of currarino syndrome: A case report.

    Hage P, Kseib C, Adem C, et al.

    International journal of surgery case reports 2019; (57()):102-105 doi:10.1016/j.ijscr.2019.02.047.

    PMID: 30933899
  16. 16

    A case of Currarino syndrome in an adult female presenting with refractory chronic constipation.

    Rojo Aldama E, Miranda García P, García Septiem J

    Revista espanola de enfermedades digestivas 2021; (113(1)):73-74 doi:10.17235/reed.2020.7096/2020.

    PMID: 33207905
  17. 17

    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
  18. 18

    Currarino Syndrome Presenting in Adulthood: A Rare Case.

    Verma A, Attry S, Haldenia K, et al.

    Cureus 2023; (15(3)):e36497 doi:10.7759/cureus.36497.

    PMID: 37090396

This page provides an educational overview of Currarino syndrome and the Currarino triad. It is for informational purposes only and does not replace professional medical advice, diagnosis, or management from your healthcare team.

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