44. Meckel diverticulum Flashcards Preview

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Flashcards in 44. Meckel diverticulum Deck (15):
1

MC congenital anomaly of the GI tract

Meckel diverticulum

2

Meckel diverticulum - definition / due to

the dicerticulum of bowel due to persistence of vitelline duct ( partial closure --> patent portion attached to ileum )

3

Meckel diverticulum - may contain

ectopic acid secreting gastric mucosa and /or pancreatic tissue

4

Meckel diverticulum can causes

1. melena ( or hematochezia) 2. RLQ pain
3. intussuseption
4. volvulus
5. obstruction near terminal ileum ( mimics appendicitis
MC asymptomatic

5

other situation associated with vitelline duct

omphalomesentic cyst = cystic dilation of vitelline fuct

6

Meckel diverticulum the rule of 6 2s

2 times as likely in males
2 inches long
2 feet from ileocecal valce
2% of popoulation
present in first 2 years of life may have 2 types of epithelial ( gastric / pancreatic )

7

• What is the most common congenital anomaly of the gastrointestinal tract?

Meckel diverticulum

8

• A 19-month-old boy has a congenital anomaly causing melena and RLQ pain. What are some potential complications?

Intussusception, volvulus, colonic obstruction (this is a Meckel diverticulum)

9

• Approximately what size is a typical Meckel diverticulum?

2 inches (the five 2's: 2 inches long, 2 feet from ileocecal valve, 2% of population, first 2 years of life, 2 epithelial types)

10

• How far are Meckel diverticula typically located from the ileocecal valve?

2 feet (the five 2's: 2 inches long, 2 feet from ileocecal valve, 2% of population, first 2 years of life, 2 epithelial types)

11

• In approximately what percentage of the population can Meckel diverticula be found?

2% (the five 2s: 2 inches long, 2 feet from ileocecal valve, 2% of population, first 2 years of life, 2 epithelial types)

12

• When in life do Meckel diverticula typically present?

First 2 years (the five 2s: 2 inches long, 2 feet from ileocecal valve, 2% of population, first 2 years of life, 2 epithelial types)

13

• A 16-month-old girl has had melena for the past 7 weeks, and sometimes clutches her RLQ. What test can confirm the most likely diagnosis?

Pertechnetate uptake by ectopic gastric mucosa to confirm Meckel diverticulum (in some cases, appendicitis may need to be ruled out)

14

• A patient with a Meckel diverticulum has significant pain. What is most likely to be causing it?

Gastric acid secretion from ectopic tissue growth (gastric and/or pancreatic)

15

• A newborn has a cystic dilation of the vitelline duct found on exam. Do you need to perform a pertechnetate study?

No, as this finding is more consistent with an omphalomesenteric cyst rather than a Meckel diverticulum

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