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Difficulty: MediumNeonatal Disorders

Match each clinical presentation of a neonate with respiratory distress to its most likely underlying diagnosis.

  • A 30-week gestation neonate presents immediately after birth with severe grunting and retractions. Chest radiography reveals a diffuse reticulogranular (ground-glass) pattern and prominent air bronchograms.Respiratory distress syndrome (RDS)
  • A 39-week gestation neonate delivered via scheduled cesarean section without labor develops tachypnea. Chest radiography demonstrates prominent perihilar streaking and fluid in the interlobar fissures.Transient tachypnea of the newborn (TTN)
  • A 41-week gestation neonate born through thick, green-stained amniotic fluid exhibits marked respiratory distress. Chest radiography shows hyperinflation, flattened diaphragms, and coarse patchy infiltrates.Meconium aspiration syndrome (MAS)
  • A 38-week gestation neonate presents with severe respiratory distress and a noticeably scaphoid abdomen. Auscultation reveals absent breath sounds over the left hemithorax and heart sounds shifted to the right.Congenital diaphragmatic hernia (CDH)

Answer

The correct matches are: 1) RDS for the premature infant with ground-glass opacities, 2) TTN for the term infant post-cesarean with fluid in the fissures, 3) MAS for the post-term infant with coarse infiltrates, and 4) CDH for the infant with a scaphoid abdomen.
Each clinical vignette provides classic epidemiological and radiographic clues pointing to a specific etiology of neonatal respiratory distress. By synthesizing gestational age, mode of delivery, and chest X-ray findings, the conditions can be accurately differentiated.

Step-by-Step Solution

1
Analyze the clinical history and radiographic findings for the 30-week infant.
The infant is premature with reticulogranular opacities, matching Respiratory distress syndrome (RDS) due to surfactant deficiency.
RDS primarily affects infants born before 34 weeks of gestation.
2
Evaluate the 39-week infant delivered via cesarean section.
Term gestation with lack of labor and fluid in fissures matches Transient tachypnea of the newborn (TTN).
TTN results from delayed clearance of fetal alveolar fluid.
3
Assess the post-term infant born through green-stained fluid.
Meconium exposure with hyperinflation and patchy infiltrates matches Meconium aspiration syndrome (MAS).
Meconium is typically passed by mature or post-term fetuses in response to stress, leading to aspiration.
4
Examine the term infant with a scaphoid abdomen.
A hollow abdomen with left-sided absent breath sounds matches Congenital diaphragmatic hernia (CDH).
The abdominal viscera herniate into the chest, compressing the developing lung.

Key Concept

Differentiation of neonatal respiratory distress etiologies based on gestational age, delivery history, and characteristic radiographic findings.
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Topics

Neonatal Disorders

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