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Tuberculosis mimicking a round pneumonia in a 13-month-old asymptomatic child with a positive PPD test. Chest radiographs (a, b) demonstrate a round opacity (arrowheads) in the anterior segment of the right upper lobe. Chest radiographs obtained a year later following anti-tuberculous treatment revealed only a residual fibrotic scar (not shown). Note the upper lobe location and indistinct margins
