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GASTROINTESTINAL_Emb
Question | Answer |
---|---|
Card 1• GI embryology. A patient has a malformed gastrointestinal tract from pharynx to duodenum. What part of the embryo had impaired development? | Foregut |
Card 2• Pancreas and spleen embryology. Is the pancreas derived from the foregut, the midgut, or the hindgut? | The foregut |
Card 3• Congenital pyloric stenosis. In a patient with congenital pyloric stenosis, hypertrophy of the pylorus leads to what problem? | Gastric outlet obstruction |
Card 4• Tracheoesophageal anomalies. What is the most common subtype of tracheoesophageal fistula? | Esophageal atresia (a blind-pouch upper esophagus with the lower esophagus connected to the trachea) |
Card 5• Congenital pyloric stenosis. An infant with projectile vomiting is found to have a palpable, epigastric, olive-sized mass is found on physical exam. Name this condition. | Congenital pyloric stenosis |
Card 6• GI embryology. In a patient with a hiatal hernia, the herniated structure was originally derived from the ____ (foregut/midgut/hindgut). | Foregut (herniation of the proximal stomach through the diaphragm) |
Card 7• Tracheoesophageal anomalies. What are some symptoms seen with the most common subtype of tracheoesophageal fistula? | Cyanosis, choking, and vomiting with feeding, air bubble on x-ray of the chest (or polyhydramnios, if still in utero) |
Card 8• Pancreas and spleen embryology A patient is diagnosed with pancreas divisum, and she asks how this developed. What do you tell her? | Failure of the ventral and dorsal pancreatic buds to fuse during embryologic development |
Card 9• Tracheoesophageal anomalies A patient's CXR shows an airway stricture. He is drooling excessively. How do you confirm your suspected diagnosis? | Attempt to pass a nasogastric tube (in a tracheoesophageal fistula, the tube will not reach the stomach) |
Card 10• Congenital pyloric stenosis In a baby with suspected congenital pyloric stenosis, what type of vomit would rule out the disorder? | Bilious (bilious vomit originates distal to the pyloric sphincter) |
Card 11• GI embryology A developing embryo suffers a malfunction of the midgut. Which region of the gastrointestinal tract will be impacted? | Duodenum to the transverse colon |
Card 12• Pancreas and spleen embryology From which dermal layer does the spleen arise: endoderm, mesoderm, or ectoderm? | Mesoderm |
Card 13• Tracheoesophageal anomalies A newborn chokes and vomits with the first feeding, and she reportedly had polyhydramnios in utero. Why might this baby become cyanotic? | The newborn may develop cyanosis from laryngospasm (to avoid reflux-related aspiration) (this is a tracheoesophageal fistula) |
Card 14• Congenital pyloric stenosis The mother of a newborn says her previous child had developed projectile vomiting. When would this most likely occur in this newborn? | 2 weeks of age |