Figure 9a. IHS in a 45-year-old man with persistent eosinophilia of 1800–3200 cells per cubic millimeter for more than 6 months. The patient had 52% BAL fluid eosinophilia. Transverse thin-section (1-mm collimation) CT scans (lung windowing) obtained at two levels reveal large nodules with surrounding ground-glass opacity in the left lung (arrow).