Early Radiologic Diagnosis of Pulmonary Infection in Febrile Neutropenic Patients: A Comparison of Serial Chest Radiography and Single CT Chest

Figure 2

Images in a 37-year-old male patient with acute myeloid leukemia whose serum galactomannan test was positive. (a) Baseline chest film shows no opacity. (b) Chest film on first day of febrile neutropenia (ANC = 11 μL) shows no opacity. (c) Chest film on third day of febrile neutropenia (ANC = 17 μL) still shows no opacity. (d) Chest film on fourth day of febrile neutropenia (ANC = 0 μL) shows new opacity at left lower lung (arrow). (e) Chest film on seventh day of febrile neutropenia (ANC = 2511 μL) shows improvement of lower lung opacity. (f) Axial CT chest on the fourth day of febrile neutropenia reveals a nodular-like consolidation with surrounding ground-glass attenuation, representing a CT halo sign. This case was evaluated as true-positive chest radiograph and CT chest.

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