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(a) Human immunodeficiency virus (HIV)-seronegative patient with tuberculosis (TB) and cavitary bronchopneumonia. A posteroanterior chest radiograph shows patchy opacities in the upper and mid zones bilaterally and a thick-walled ring shadow in the left mid zone. (b) HIV-seropositive TB patient with a CD4+ T-cell count of 17 cells mm–3 and extensive bronchopneumonia. Anteroposterior chest radiograph shows bilateral diffuse reticulonodular and patchy opacities involving all lung zones.
