Your Cart ()


Spend $x to Unlock Free Shipping to  

Ultrasound for the Win! 3-year-old with abdominal pain #US4TW

By Ryan Gibbons, MD December 04, 2019 0 comments

ultrasound for the win intussusception

A 3-year-old Hispanic female with no significant past medical or surgical history presents to the Emergency Department with her mother for a 3 day history of crampy abdominal pain, intermittent bloody diarrhea and fever. There has been no recent travel, admissions, or antibiotic use. Her older sister reports similar symptoms, which have resolved. The patient saw her pediatrician the day prior, who recommended supportive care including oral rehydration.

This Ultrasound For The Win!” (#US4TW) Case Series focuses on a real clinical cases where point-of-care ultrasound changed the management of a patient’s care or aided in the diagnosis.

Learning Objectives

  1. Compile a differential diagnosis for pediatric abdominal pain.
  2. Discuss the role point-of-care ultrasound (POCUS) plays in differentiating various etiologies of pediatric abdominal pain.
  3. Discuss the epidemiology, presentation, diagnosis (including common sonographic findings), and management of intussusception.


  • P 124 bpm
  • RR 24 breaths/min
  • O2 98% room air
  • T 36.8 C

Differential Diagnosis

  • Appendicitis
  • Clostridium difficile
  • Constipation
  • Gastroenteritis
  • Hemolytic uremic syndrome 
  • Henoch-Schönlein purpura
  • Intussusception
  • Meckel’s diverticulum
  • Mesenteric lymphadenitis
  • Obstruction
  • Peritonitis
  • Volvulus

On physical examination, the patient is afebrile and nontoxic appearing but visibly uncomfortable. Her abdomen is mildly distended and diffusely tender without peritoneal findings. Genitourinary exam is unremarkable. A severe diaper rash is present on her buttocks, but no stool was noted initially.

A point-of-care ultrasound (POCUS) is performed at the bedside:

Point-of-Care Ultrasound

Figure 1. Video of the “target sign” and free fluid concerning for intussusception in this pediatric patient (still image with labels in Figure 2)
Figure 2. The “target sign” and free fluid concerning for intussusception in this pediatric patient.
Figure 3. The “pseudo-kidney sign” in a post gastric bypass adult patient. Note the presence of high-risk findings including fluid between bowel segments (thick arrow) and involvement of the mesentery (thin arrow)

Ultrasound is the diagnostic imaging modality of choice in diagnosing intussusception in pediatric patients. While a curvilinear probe is required in adult patients, a linear probe is often ideal in the pediatric population.

Sonographic findings of intussusception include: 

  • A target or pseudokidney sign (Figures 1-2),​1​ which has a reported sensitivity of 98–100%,​1,2​ specificity of 88–100%,1-2 and negative predictive value of 100%​3​

High-risk findings (which may predict failure of enema)​1​ include:

  • Peritoneal fluid between the bowel walls (Figure 2)
  • Lack of blood flow of the bowel wall with Color Doppler
  • Intraperitoneal free air (see a prior #US4TW case)
  • Involvement of the mesentery (Figure 2)

Diagnosis & Case Conclusion 

The patient was diagnosed with intussusception on point-of-care ultrasound and transferred to the local children’s hospital for successful treatment with an air enema. Notably, the patient had currant jelly stools while at the children’s hospital. (Figure 4). 

The patient had an uneventful hospital course and was discharged home without complications.

Figure 4. Currant jelly stool



  • Intussusception is defined as the telescoping of proximal bowel (the “intussusceptum”) into an adjacent distal bowel segment (the “intussuscipiens”)​4​


  • Male:female ratio is 3-8:1
  • 2/3 of cases <1 year old​1​
    • Leading cause of small bowel obstruction (SBO) in children
  • 5% of cases occur in adults​4​
    • 1-5% of adult SBO cases
    • 8-20% of adult cases are benign without lead point


  • Classic triad: Colicky abdominal pain, vomiting, and bloody stools
    • Only present in 10-25% of patients​1,5​
    • Currant jelly stools are rare
  • Nonspecific findings:
    • Severe, intermittent colicky abdominal pain
    • Non-bilious to bilious emesis
    • Constipation
    • Abdominal distention
    • Bloody stools (PPV 80%)​5​
    • RUQ abdominal mass (PPV 94%)​5​


  1. Idiopathic – most common (7-20%)​4​
    • Ileo-colic 
    • Ileo-cecal
    • Often viral (i.e. adenovirus) in pediatric cases
    • 80-90% of pediatric cases benign​4​
  1. Entero-enteral (jejuno-jejunal, jejuno-ileal, ileo-ileal)
    • Small bowel only
    • Henoch-Schönlein purpura
    • Cystic fibrosis
  1. Colo-colic
    • Large bowel only
    • Malignant etiology more likely (2/3 of cases)
  1. Pathologic lead points​1,4​
    • Meckel’s diverticulum
    • Polyp
    • Cyst
    • Malignancy (most common cause in adults)
    • Stricture
    • Inflammatory bowel disease
    • Adhesions
  1. Post-gastric bypass surgery in adult patients


  • Initial diagnosis missed in 40-50% of cases
  • Ultrasound is the diagnostic imaging modality of choice
  • CT scan​4​
    • Sensitivity: 53-100%
    • More beneficial in adults
      • 90% of cases have pathologic lead points
      • Identifies etiology
    • Limitations: radiation, contrast, and transportation out of ED
  • X-ray
    • No role for x-rays because of poor sensitivities​1,6​ 


  • Fluid resuscitation
  • Surgical consultation on ALL patients
  • Pneumatic or hydrostatic enema is preferred modality in pediatric patients​1​
    • Risk of perforation: 1%
    • Recurrence rate: 10%
  • Surgery for adults (and some pediatric cases)​1​
    • Recurrence rate: 1%


  • Perforation
  • Ischemia
  • Obstruction

Take Home Points

  • Intussusception is an often missed diagnosis, but should remain high on your differential diagnosis for pediatric patients presenting with abdominal pain, and for adult patients with a history of gastric bypass surgery.
  • The symptoms of intussusception are often non-specific. The classic triad of colicky abdominal pain, vomiting, and bloody stools is present in <25% of patients with intussusception. The presence of currant jelly stools is a rare finding.
  • Ultrasound is the diagnostic imaging modality of choice for pediatric patients, and sonographic findings may include a “target sign” or “pseudokidney sign”. 
  • Sonographic findings suggesting high risk patients include the presence of free air, peritoneal fluid between the bowel walls, lack of blood flow in bowel wall, and involvement of the mesentery.

To learn more about pediatric point-of-care ultrasound, take the free ALiEMU course on intussusception point-of-care ultrasonography for certificate credit. 


  1. 1.
    Applegate K. Intussusception in children: evidence-based diagnosis and treatment. Pediatr Radiol. 2009;39 Suppl 2:S140-3.
  2. 2.
    Shanbhogue R, Hussain S, Meradji M, Robben S, Vernooij J, Molenaar J. Ultrasonography is accurate enough for the diagnosis of intussusception. J Pediatr Surg. 1994;29(2):324-327; discussion 327-8.
  3. 3.
    Verschelden P, Filiatrault D, Garel L, et al. Intussusception in children: reliability of US in diagnosis–a prospective study. Radiology. 1992;184(3):741-744.
  4. 4.
    Marinis A, Yiallourou A, Samanides L, et al. Intussusception of the bowel in adults: a review. World J Gastroenterol. 2009;15(4):407-411.
  5. 5.
    Harrington L, Connolly B, Hu X, Wesson D, Babyn P, Schuh S. Ultrasonographic and clinical predictors of intussusception. J Pediatr. 1998;132(5):836-839.
  6. 6.
    Best evidence topic reports. Bet 4. Role of plain abdominal radiograph in the diagnosis of intussusception. Emerg Med J. 2008;25(2):106-107.

Author information

Ryan Gibbons, MD

Ryan Gibbons, MD

Assistant Director, Division of Emergency Ultrasound
Assistant Professor
Department of Emergency Medicine
Lewis Katz School of Medicine at Temple University

The post Ultrasound for the Win! 3-year-old with abdominal pain #US4TW appeared first on ALiEM.

Older Post Newer Post


I agree to subscribe to updates from Shoptimized™


B. Dupont Purchased 2 minutes ago from Los Angeles, CA
C. Santos Purchased 2 minutes ago from Chicago, IL
5.11 FLEX TacMed Pouch
D. Kim Purchased 2 minutes ago from Houston, TX
5.11 FLEX Tourniquet Pouch
E. García Purchased 2 minutes ago from Phoenix, AZ
5.11 UCR TacReady Headrest Pouch
F. Müller Purchased 1 minute ago from Philadelphia, PA
Abdominal Aortic and Junctional Tourniquet-Stabilized (AAJT-S)
G. Rossi Purchased 2 minutes ago from San Antonio, TX
Adjustable Flange Nasopharyngeal Airway
H. Martinez Purchased 2 minutes ago from San Diego, CA
Adult Bag Valve Mask
J. López Purchased 2 minutes ago from Dallas, TX
Altama OTB Maritime Assault Boot - Low Height
K. Nowak Purchased 1 minute ago from San Jose, CA
Altama OTB Maritime Assault Boot - Mid Height
L. Müller Purchased 2 minutes ago from Austin, TX
AMBU Perfit ACE Adjustable Cervical Extrication Collar
M. Ivanova Purchased 2 minutes ago from Jacksonville, FL
Amphibious Trauma Kit
N. Andersen Purchased 2 minutes ago from Fort Worth, TX
Army CLS Resupply Kit (CLS™)
O. Fischer Purchased 1 minute ago from Columbus, OH
Backpack Accessory Pouch Kit - 4 Color
P. Bernard Purchased 1 minute ago from Charlotte, NC
Ballistic Soft Panel for Plate Carrier
S. Schmidt Purchased 1 minute ago from San Francisco, CA
Bandage Fill Kit
T. Kowalski Purchased 2 minutes ago from Indianapolis, IN
Bandage Shears
X. Martinez Purchased 1 minute ago from Seattle, WA
Bard-Parker Safety Scalpel #10
Y. Ahmed Purchased 2 minutes ago from Denver, CO
Basic Field Surgical Airway Kit w/ET Tube
Z. Khan Purchased 2 minutes ago from Washington, DC
Beacon Chest Seal - Occlusive/Non-Vented
A. Ali Purchased 1 minute ago from Boston, MA