Parainfluenza Virus Type 3 Pneumonia in Bone Marrow Transplant Recipients: Multiple Small Nodules in High‐Resolution Lung Computed Tomography Scans Provide a Radiological Clue to Diagnosis

We report the findings of high-resolution chest computed tomography of 6 hematopoietic stem cell transplant recipients with parainfluenza virus type 3 pneumonia who were not infected with any other pathogens. All patients had multiple small nodules (diameter, !5 mm) without cavitation ina peribronchial distribution. Changes preceded microbiological diagnosis in 4 of 6 cases.