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PubMed This is a summary of 19 peer-reviewed journal articles Updated
Pediatric Surgery

The Digestive System and Right Isomerism: Malrotation Risks

At a Glance

Children with right isomerism often have intestinal malrotation because their digestive organs do not settle into normal positions. This creates a risk for midgut volvulus, a dangerous twisting of the intestines. Any sign of green, bilious vomiting requires immediate emergency medical attention.

While the heart is often the primary focus in Right Isomerism, the “double right-sided” blueprint also affects how the digestive system is organized. In a typical body, the intestines follow a specific rotation during development to fit into the abdomen. In Right Isomerism, this process is often interrupted, leading to intestinal malrotation [1][2].

Understanding Intestinal Malrotation

Intestinal malrotation means the bowels did not complete their natural “looping” and settling process [1].

  • Atypical Positions: Instead of the liver being on the right and the stomach on the left, you may hear that your child has a midline liver (stretched across the middle) or that their stomach is on the right side of the body [3][4].
  • The Risk of Volvulus: The most serious concern with malrotation is a midgut volvulus. This occurs when the intestines twist around their own blood supply (the superior mesenteric artery) [5]. This is a life-threatening emergency because the twist can cut off blood flow to the bowel, leading to rapid tissue death (ischemia) [6][7].

Recognizing an Emergency: Bilious Vomiting

Because a volvulus can happen quickly, parents must be vigilant for “red flag” symptoms. The most critical sign is bilious vomiting—vomit that is dark green, yellow-green, or bright fluorescent green [8][9].

  • Green means Go: If your child has green or yellow-green vomit, it is a surgical emergency. You must go to the emergency room immediately [8].
  • Other Signs: Be alert for a swollen or firm abdomen, signs of intense pain (like inconsolable crying or drawing the legs up), or bloody stools [9][10].

Diagnosis and the Ladd Procedure

To check the position of the intestines, doctors typically use an Upper GI series. This is a specialized X-ray where the baby swallows a small amount of contrast liquid (barium) so the doctor can watch how it moves through the stomach and the first part of the small intestine [11][12].

The Surgical Debate

If malrotation is found but the child is healthy and has no symptoms, there is a medical debate about whether to perform a prophylactic Ladd procedure [13][14]. This is a surgery to reposition the intestines and widen their base to prevent a future twist [15].

  • The Argument For Surgery: Some surgeons prefer to fix the malrotation electively to remove the lifelong risk of a sudden, emergency volvulus [15].
  • The Argument Against Surgery: Because children with Right Isomerism often have complex heart disease, any surgery carries higher risks [16][17]. Some studies suggest the actual risk of a twist in these patients may be low, and the surgery itself can occasionally cause complications like bowel obstructions later in life [18][14].

Your medical team, including a pediatric surgeon and a cardiologist, will work with you to weigh these risks and decide on the best plan for your child [19].

Common questions in this guide

What is intestinal malrotation in right isomerism?
Intestinal malrotation means the bowels did not complete their natural looping and settling process during development. In children with right isomerism, this can result in atypical organ placement, such as a midline liver or having the stomach on the right side of the body.
What are the emergency signs of a midgut volvulus?
The most critical sign of a volvulus is bilious vomiting, which appears dark green, yellow-green, or bright fluorescent green. Other emergency signs include a swollen or firm abdomen, bloody stools, and intense pain shown by inconsolable crying or drawing the legs up.
How is intestinal malrotation diagnosed?
Doctors typically use an Upper GI series to check the position of the intestines. During this specialized X-ray, the baby swallows a small amount of contrast liquid so the medical team can watch how it moves through the stomach and small intestine.
What is the Ladd procedure, and is it always necessary?
The Ladd procedure is a surgery that repositions the intestines and widens their base to prevent future twisting. For asymptomatic children with right isomerism, medical teams must carefully weigh the benefits of this surgery against the higher surgical risks caused by complex heart disease.

Questions to Ask Your Doctor

Curated prompts to bring to your next appointment.

  1. 1.Has our child had an Upper GI series or specialized ultrasound to check their intestinal position?
  2. 2.Where exactly are the stomach and liver located in our baby's abdomen?
  3. 3.Given their heart condition, what are the specific risks if we choose to have a 'prophylactic' Ladd procedure?
  4. 4.If we choose to watch and wait, how can we be sure we won't miss the signs of a developing volvulus?
  5. 5.What is the nearest hospital that can handle both a bowel emergency and my child's complex heart anatomy?

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 (19)
  1. 1

    Intestinal malrotation in patients with situs anomaly: Implication of the relative positions of the superior mesenteric artery and vein.

    Choi KS, Choi YH, Cheon JE, et al.

    European journal of radiology 2016; (85(10)):1695-1700 doi:10.1016/j.ejrad.2016.07.013.

    PMID: 27666604
  2. 2

    Ivemark syndrome-a rare entity with specific anatomical features.

    Hrusca A, Rachisan AL, Lucian B, et al.

    Revista medica de Chile 2015; (143(3)):383-6.

    PMID: 26005826
  3. 3

    Laparoscopic sleeve gastrectomy in polysplenia syndrome/left isomerism: A case report.

    Jeragh F, Aljazzaf I, Al Khayyat H

    International journal of surgery case reports 2020; (75()):488-491 doi:10.1016/j.ijscr.2020.09.079.

    PMID: 33076202
  4. 4

    Characterization of ultrasound and postnatal pathology in fetuses with heterotaxy syndrome.

    Wu Q, Guo S, Huang B, et al.

    Frontiers in cardiovascular medicine 2023; (10()):1195191 doi:10.3389/fcvm.2023.1195191.

    PMID: 37485264
  5. 5

    An adult presentation of midgut volvulus secondary to intestinal malrotation: A case report and literature review.

    Butterworth WA, Butterworth JW

    International journal of surgery case reports 2018; (50()):46-49 doi:10.1016/j.ijscr.2018.07.007.

    PMID: 30077833
  6. 6

    Notable Clinical Differences Between Neonatal and Post-Neonatal Intestinal Malrotation: A Multicenter Review in Southern Japan.

    Kedoin C, Muto M, Nagano A, et al.

    Journal of pediatric surgery 2024; (59(4)):566-570 doi:10.1016/j.jpedsurg.2023.11.020.

    PMID: 38145920
  7. 7

    A Novel Technique of SMA Massage with Systemic Fibrinolytic Therapy in Ischemic Midgut Volvulus: As a Lifesaving Last Expedient.

    Giriradder VB, Jadhav V, Anilkumar PL, Babu MN

    Journal of Indian Association of Pediatric Surgeons 2023; (28(1)):25-28 doi:10.4103/jiaps.jiaps_69_22.

    PMID: 36910297
  8. 8

    Infant malrotation with midgut volvulus: A retrospective review of clinical presentation and delays in care at a Canadian tertiary paediatric centre.

    Filion L, Beaunoyer M, Miron MC, et al.

    Paediatrics & child health 2025; (30(6)):453-458 doi:10.1093/pch/pxaf042.

    PMID: 41049711
  9. 9

    A Rare Case of Delayed Presentation of Acute Midgut Volvulus in an Adolescent.

    Nichat P, Gandhi AS, Rathod C, et al.

    Cureus 2024; (16(6)):e62256 doi:10.7759/cureus.62256.

    PMID: 39006604
  10. 10

    Intestinal malrotation and midgut volvulus.

    Hamidi H, Obaidy Y, Maroof S

    Radiology case reports 2016; (11(3)):271-4 doi:10.1016/j.radcr.2016.05.012.

    PMID: 27594965
  11. 11

    Making the diagnosis of midgut volvulus: Limited abdominal ultrasound has changed our clinical practice.

    Wong K, Van Tassel D, Lee J, et al.

    Journal of pediatric surgery 2020; (55(12)):2614-2617 doi:10.1016/j.jpedsurg.2020.04.012.

    PMID: 32471760
  12. 12

    Ultrasound for malrotation and volvulus - point.

    Youssfi M, Goncalves LF

    Pediatric radiology 2022; (52(4)):716-722 doi:10.1007/s00247-021-05154-0.

    PMID: 34633478
  13. 13

    A case report of a newborn who underwent ultra-high enterostomy and intestinal fluid return after necrosis of intestinal volvulus.

    Cui L, Zhang X, Liu Y, Chen Y

    Translational pediatrics 2024; (13(11)):2067-2076 doi:10.21037/tp-24-214.

    PMID: 39649659
  14. 14

    Diagnosis and management of intestinal rotational abnormalities with or without volvulus in the pediatric population.

    Svetanoff WJ, Srivatsa S, Diefenbach K, Nwomeh BC

    Seminars in pediatric surgery 2022; (31(1)):151141 doi:10.1016/j.sempedsurg.2022.151141.

    PMID: 35305800
  15. 15

    Intestinal Malrotation and Volvulus in Neonates: Laparoscopy Versus Open Laparotomy.

    Ferrero L, Ahmed YB, Philippe P, et al.

    Journal of laparoendoscopic & advanced surgical techniques. Part A 2017; (27(3)):318-321 doi:10.1089/lap.2015.0544.

    PMID: 28055334
  16. 16

    The impact of cardiac risk factors on short-term outcomes for children undergoing a Ladd procedure.

    Putnam LR, Anderson KT, Tsao K, et al.

    Journal of pediatric surgery 2017; (52(3)):390-394 doi:10.1016/j.jpedsurg.2016.09.064.

    PMID: 27894758
  17. 17

    Observation versus prophylactic Ladd procedure for asymptomatic intestinal rotational abnormalities in heterotaxy syndrome: A systematic review.

    Landisch R, Abdel-Hafeez AH, Massoumi R, et al.

    Journal of pediatric surgery 2015; (50(11)):1971-4.

    PMID: 26358665
  18. 18

    Evaluating a management strategy for malrotation in heterotaxy patients.

    Abbas PI, Dickerson HA, Wesson DE

    Journal of pediatric surgery 2016; (51(5)):859-62.

    PMID: 26968699
  19. 19

    Intestinal Rotation Anomalies.

    Pelayo JC, Lo A

    Pediatric annals 2016; (45(7)):e247-50 doi:10.3928/00904481-20160602-01.

    PMID: 27403672

This page provides educational information about right isomerism and intestinal malrotation. It does not replace professional medical advice. Always consult your pediatric cardiologist and surgeon about your child's specific symptoms and surgical risks.

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