Meconium aspiration

Radswiki et al.

Meconium aspiration occurs secondary to intrapartum or intrauterine aspiration of meconium, usually in the setting of fetal distress, and usually in term or post-term infants.


Aspirated meconium can cause small airways obstruction and a chemical pneumonitis.

Radiographic features

Plain radiograph

Features include:

  • high lung volumes (secondary to small airway obstruction)
  • asymmetric, patchy pulmonary opacities
  • pleural effusions can be seen
  • pneumothorax in 20-40% of cases (secondary to small airway obstruction)

See also

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Article information

rID: 12170
Systems: Chest, Paediatrics
Section: Pathology
Tag: refs
Synonyms or Alternate Spellings:
  • Meconium aspiration syndrome
  • Meconium aspiration syndrome (MAS)

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