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Lung abscess in a 2-year-old boy with fever and cough. a Lateral and (b) frontal chest radiographs reveal a large round opacity (arrowheads) with an air-fluid level (arrowheads) located posteriorly in the right upper lobe. c Contrast-enhanced CT scan obtained later shows a large rim-enhancing lesion with an air-fluid (arrowheads) level consistent with a lung abscess
