Examkin

Soru

Zorluk: ZorNeonatal Disorders

Match the following neonatal clinical presentations and investigative findings to their most likely underlying diagnosis.

  • A full-term neonate exhibits failure to pass meconium by 48 hours of life, accompanied by progressive abdominal distension. A contrast enema demonstrates a rectosigmoid index less than 1 with a distinct caliber change. Rectal suction biopsy is pending.Hirschsprung disease
  • A 28-week gestation neonate at 12 days of life develops feeding intolerance, temperature instability, and hematochezia. Laboratory analysis reveals a pH of 7.267.26 and HCO3−HCO_3^- of 1414 mEq/L. Abdominal radiography shows pneumatosis intestinalis.Necrotizing enterocolitis
  • A full-term neonate with upslanting palpebral fissures and a single palmar crease develops bilious vomiting shortly after birth. Radiography demonstrates two large gas collections in the upper abdomen with a complete absence of distal bowel gas.Duodenal atresia
  • A term neonate born to a mother with a positive urine toxicology screen for cocaine presents with bilious emesis. Radiography shows multiple dilated loops of proximal bowel. Surgery reveals bowel segment discontinuity and a 'apple peel' appearance.Jejunal atresia
  • A term neonate develops abdominal distension and delayed meconium passage. Contrast enema highlights a microcolon and an inspissated mass with a 'soap bubble' appearance in the terminal ileum. A sibling has a history of recurrent pulmonary infections.Meconium ileus

Cevap

The presentations correspond to Hirschsprung disease (transition zone), Necrotizing enterocolitis (pneumatosis intestinalis in a premature infant), Duodenal atresia (double bubble in Down syndrome), Jejunal atresia (vascular accident from cocaine use), and Meconium ileus (microcolon and cystic fibrosis history), respectively.
Each clinical vignette provides highly specific anatomical, demographic, and radiographic clues that uniquely identify distinct neonatal gastrointestinal disorders. Correctly matching them requires integrating maternal history (e.g., cocaine use), genetic predispositions (e.g., Down syndrome, Cystic fibrosis), and pathognomonic imaging signs (e.g., pneumatosis, double bubble, transition zone).

Adım Adım Çözüm

1
Identify the primary symptom and patient demographic in the first vignette.
Term neonate with delayed meconium passage and a radiographic transition zone.
These findings point toward an aganglionic segment of the colon, characteristic of Hirschsprung disease.
2
Analyze the clinical and laboratory data for the premature neonate.
Feeding intolerance, metabolic acidosis, and pneumatosis intestinalis in a 28-week neonate.
Pneumatosis intestinalis is pathognomonic for Necrotizing enterocolitis (NEC), a severe gastrointestinal emergency primarily affecting premature infants.
3
Evaluate the dysmorphic features and radiographic findings in the third vignette.
Down syndrome phenotype paired with early bilious vomiting and a 'double bubble' sign.
This combination is highly specific for Duodenal atresia, caused by failure of duodenal recanalization.
4
Connect maternal history to the anatomical findings in the fourth vignette.
Maternal cocaine use, multiple dilated loops, and bowel discontinuity.
Cocaine causes vasoconstriction leading to in utero vascular accidents, the primary etiology of Jejunal atresia.
5
Correlate family history with the contrast enema findings in the final vignette.
Sibling with recurrent infections (suggesting Cystic Fibrosis) and a microcolon with a 'soap bubble' mass.
Thickened, inspissated meconium blocking the terminal ileum (Meconium ileus) is the earliest clinical manifestation of Cystic Fibrosis.

Anahtar Kavram

Neonatal Gastrointestinal Emergencies and Obstructions
Bu soruyu puanla

Konular

Neonatal Disorders

Bu konudan daha fazla soru