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Reviewed by Missy Beall DVM, PhD on
Posted February 25, 2014 in Dog Diseases & Conditions A-Z

Thankfully, intussusception is a word that most people have neither heard of nor have had to deal with. Although it is a relatively uncommon gastrointestinal problem, it can be fatal if not treated promptly and therefore should be on everyone’s radar.

What is an intussusception?
Intussusception occurs when a portion of gastrointestinal (GI) tract gets trapped inside the lumen of adjoining GI tract. This “telescoping” effect can lead to a partial or complete mechanical obstruction and can compromise the blood flow to the trapped portion of GI tissue. If prolonged, the trapped tissue can become ischemic and die. Intussusceptions can occur anywhere along the GI tract and can involve the stomach, small intestine or colon. In cats and dogs, the most common site for intussusceptions is the segment of the small intestine known as the jejunum.

Secondary to:

  • Ingestion of foreign bodies (most commonly linear foreign bodies such as string)
  • Parasites
  • Dietary indiscretion
  • Intestinal infections (viral being the most common)
  • Intestinal tumors or masses
  • Idiopathic (meaning unknown cause)

Who is at risk?
An intussusception can occur in dogs and cats of all breeds but are more common in dogs. Certain breeds are more predisposed, such as German Shepherds and Siamese. It is more commonly seen in young animals less than one year of age.


  • Abdominal pain
  • Vomiting
  • Bloody Diarrhea (classically described as “currant jelly”)
  • Abdominal mass (likely only detected by a veterinarian)

If your veterinarian is concerned that your pet may have an intussusception, they will likely obtain x-rays (radiographs) and/or an abdominal ultrasound to make the diagnosis and confirm their suspicion based on symptoms and physical exam findings. They will also obtain blood work in order to evaluate and address dehydration and electrolyte imbalances prior to surgery.

Intussusception is considered a surgical emergency. In addition to being very painful, intussusception can be fatal without treatment. Treatment involves stabilizing the animal with IV fluids, correcting electrolyte imbalances, and most importantly, surgery to free the trapped intestine. Depending on how long the intestine has been trapped, the involved intestine may need to be resected if it is no longer viable due to lack of blood flow. Unfortunately this is commonly the case with intussusception. The damaged intestine is removed and healthy intestine is reconnected (this is called an anastomosis). It is important to note that the sooner intussusceptions are treated the better the chance of survival.

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Ruth has more than 15 years of experience in the veterinary industry as a companion animal veterinarian in private practice. Along with being a writer and media personality, she is also a founding member of IDEXX’s Pet Health Network team.