Underlying Causes
Meckel's diverticulum is a congenital defect, meaning it is present at birth. It occurs when the vitelline duct, a tube connecting the growing fetus to the yolk sac during early pregnancy, fails to fully disappear (obliterate) by the seventh week of gestation. This results in a small pouch remaining on the ileum, the lower part of the small intestine. In many cases, this pouch contains ectopic tissue, meaning cells that belong in other organs such as the stomach or pancreas are found in the diverticulum. If stomach tissue is present, it secretes acid that can erode the delicate lining of the adjacent intestine, leading to ulcers and bleeding.

Risk Factors
The condition itself occurs randomly and is not preventable. However, certain factors increase the likelihood of developing symptoms. Males are significantly more likely than females to experience complications, even though the defect occurs at equal rates in both sexes. Age is also a key factor; children are more prone to bleeding complications, while adults are more likely to experience intestinal obstruction.

Prevention
Because Meckel's diverticulum is a developmental anomaly that forms before birth, there is no known way to prevent it. Primary prevention strategies such as vaccines or lifestyle changes do not apply. For individuals known to have the condition (incidental finding), prevention of future complications may involve surgical removal, though this decision is made on a case-by-case basis.

Signs and Symptoms
Symptoms can vary widely depending on the patient's age. In young children, particularly those under two years old, the most common symptom is painless rectal bleeding. This blood may appear bright red, dark maroon, or jelly-like (often described as "currant jelly" stools). In older children and adults, symptoms often resemble those of a bowel obstruction or appendicitis. These include severe cramping abdominal pain, tenderness near the belly button, abdominal bloating, nausea, and vomiting. If the diverticulum becomes inflamed, a condition known as diverticulitis, it can cause fever and localized pain.

Diagnostic Tests
Diagnosing this condition can be challenging because symptoms often mimic other disorders. For children with rectal bleeding, the most effective test is a "Meckel's scan" (technetium-99m pertechnetate scan). This nuclear medicine exam detects the ectopic gastric tissue within the diverticulum. In adults or cases involving obstruction, doctors may use CT scans or wireless capsule endoscopy (a pill-sized camera swallowed by the patient). Frequently, the condition is only definitively identified during a laparoscopy or surgery performed for suspected appendicitis.

Surgical Treatment
The definitive treatment for a symptomatic Meckel's diverticulum is surgical removal. This procedure, known as a diverticulectomy or small bowel resection, involves removing the abnormal pouch and sometimes a small segment of the adjacent intestine to ensure all damaged or ectopic tissue is gone. Modern surgery is often performed using laparoscopic (keyhole) techniques, which results in smaller scars and faster recovery. If the diverticulum is infected or has perforated, emergency surgery is required to clean the abdominal cavity and repair the bowel.

Management of Asymptomatic Cases
When a Meckel's diverticulum is discovered accidentally during a surgery for another issue, the decision to remove it depends on specific risk factors. Surgeons may choose to remove it if the patient is male, under 50 years old, or if the pouch has palpable abnormalities, to prevent future problems. Otherwise, it may be left alone.

When to Seek Medical Care
Immediate medical attention is necessary if a child passes bloody, maroon, or tarry stools. Severe abdominal pain that does not go away, especially if accompanied by vomiting or inability to pass gas, requires emergency evaluation to rule out intestinal obstruction.

Severity and Complications
For approximately 98% of people with this anatomical variant, the condition is asymptomatic and benign for their entire lives. However, when complications occur, they can be severe. The most serious risks include massive gastrointestinal bleeding which can lead to anemia or shock, and intestinal obstruction caused by the bowel twisting (volvulus) or telescoping into itself (intussusception). Perforation (a rupture of the pouch) can lead to peritonitis, a life-threatening infection of the abdominal cavity.

Prognosis
The long-term prognosis is excellent. Surgical removal is curative, meaning the condition will not return. The mortality rate for elective surgery is virtually zero, and it remains very low for symptomatic cases when treated promptly. Most patients recover fully within a few weeks and return to normal activities without dietary restrictions or long-term health consequences.

Impact on Daily Activities
Individuals with an asymptomatic Meckel's diverticulum live normal lives with no restrictions on diet, exercise, or school activities. For those who undergo surgery, daily life is temporarily affected during the recovery period, which typically lasts two to six weeks depending on whether the procedure was laparoscopic or open. During recovery, patients may need to limit heavy lifting and follow a transitional diet, starting with liquids and gradually moving to solids as bowel function returns.

Questions to Ask Your Healthcare Provider

• Is the Meckel's scan necessary for my child's symptoms?
• If the diverticulum is found incidentally, do you recommend removing it?
• What are the signs of infection after surgery?
• Will my child need any long-term follow-up after the operation?
• Are there any specific activities to avoid during the post-surgical recovery?

Q: Is Meckel's diverticulum hereditary?
A: No, it is a congenital defect that occurs randomly during fetal development and is not typically passed down from parents to children.

Q: What foods should I avoid if I have this condition?
A: There are no specific dietary restrictions for people with a Meckel's diverticulum unless they are recovering from surgery.

Q: Can the diverticulum grow back after it is removed?
A: No, once the diverticulum is surgically removed, it does not grow back.

Q: Why is it called the "Rule of 2s"?
A: Doctors use this rule to remember that the condition affects 2% of the population, is often located 2 feet from the end of the small intestine, is 2 inches long, and symptoms often appear before age 2.