Meconium pneumonitis

Discussion:

The typical appearances of an aspiration pneumonitis - in this case, the 'chemical' irritant causing the pneumonitis is meconium, aspirated at birth.

The changes are most pronounced in the upper lobes due to the neonates likely supine positioning at the time of the aspiration vis a vis the typical adult aspiration observed in the lower lobes due to being usually upright.

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