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Computed tomography (CT) scan findings in Case 4. (a) The patient developed progressive dyspnea and CT scan showed multiple patchy infiltration. (b) Dyspnea improved after steroid treatment. (c) Scattered ground‐glass opacities (GGOs) with a reticular pattern were evident when the patient developed fever, dyspnea, and productive cough. (d) Infiltration resolved after treatment.
