Match each neonatal clinical presentation with its underlying pathophysiologic or embryologic mechanism.
- A 30-week gestation neonate develops temperature instability, abdominal distension, and bloody stools at 10 days of life; plain radiography demonstrates pneumatosis intestinalis.Immature intestinal mucosal barrier leading to bacterial invasion and ischemic necrosis
- A 3-day-old term neonate presents with acute hemodynamic instability and bilious emesis; an upper gastrointestinal series reveals a "corkscrew" configuration of the proximal bowel.Incomplete counterclockwise rotation of the midgut around the superior mesenteric artery
- A 2-day-old infant with a known CFTR gene mutation exhibits progressive abdominal distension and failure to pass meconium; contrast enema demonstrates a microcolon.Accumulation of abnormally thick, inspissated intraluminal secretions obstructing the terminal ileum
- A 1-day-old term infant with a flat facial profile and prominent epicanthal folds develops bilious emesis; abdominal imaging shows large pockets of air in the stomach and proximal duodenum with no distal bowel gas.Failure of epithelial proliferation and subsequent recanalization of the embryonic intestinal lumen
- A 3-day-old term infant fails to pass meconium and exhibits a tightly contracted anal sphincter that yields an explosive release of gas and stool upon digital examination.Arrest of craniocaudal migration of neural crest cells into the hindgut
Cevap
The correct matches pair each clinical vignette (NEC, Midgut Volvulus, Meconium Ileus, Duodenal Atresia, and Hirschsprung disease) directly with its respective embryologic or pathophysiologic etiology.
Each matching pair correctly identifies the classic clinical presentation of a neonatal gastrointestinal emergency and links it to its definitive pathophysiologic or embryologic mechanism. Accurate matching requires synthesizing the infant's gestational age, specific physical exam findings, and pathognomonic radiographic signs to first determine the diagnosis, and then recalling the developmental defect or acquired pathology responsible for the condition.
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Anahtar Kavram
Pathophysiology and Embryology of Neonatal Gastrointestinal Emergencies