CGRN Pediatric Gastroenterology

Question 1

Which finding differentiates pyloric stenosis from GERD in a 4-week-old infant?

Accepted Answer

Projectile non-bilious vomiting after feeding

Answer

Pyloric stenosis presents with forceful, projectile, non-bilious vomiting due to gastric outlet obstruction, typically at 2–8 weeks of age.

Question 2

Which pediatric GI condition is characterized by absence of ganglion cells in the distal colon?

Accepted Answer

Hirschsprung disease

Answer

Hirschsprung disease results from failure of neural crest cell migration, leaving a segment of colon without enteric ganglion cells and unable to relax.

Question 3

The classic triad of intussusception in a toddler includes colicky abdominal pain, vomiting, and which other finding?

Accepted Answer

Currant-jelly stools

Answer

Currant-jelly stools result from mucosal ischemia and sloughing caused by the invaginated bowel obstructing blood supply.

Question 4

An infant with necrotizing enterocolitis (NEC) on X-ray will most likely show which finding?

Accepted Answer

Pneumatosis intestinalis

Answer

Pneumatosis intestinalis — air within the bowel wall — is the pathognomonic radiographic finding of necrotizing enterocolitis.

Question 5

Which condition should be ruled out first in a child presenting with painless rectal bleeding and a Meckel's scan?

Accepted Answer

Meckel's diverticulum with ectopic gastric mucosa

Answer

Meckel's diverticulum with ectopic gastric mucosa secretes acid that ulcerates adjacent ileum, causing painless rectal bleeding detectable by technetium-99m scan.

CGRN - Certified Gastroenterology Registered Nurse Practice Test

CGRN - Certified Gastroenterology Registered Nurse Practice Test

CGRN Pediatric Gastroenterology