Preschooler with a cough and fever

CXR and chest CT of pulmonary tuberculosis
CXR AP (above) shows prominence of the left hilum. Axial CT without contrast of the chest in soft tissue windows (below left) shows left hilar lymphadenopathy while the lung windows (below right) show next to the left hilar lymphadenopathy an infiltrate with a tree-in-bud pattern in the posterior left lung.

The diagnosis was tuberculosis pneumonia.