Axial and coronal unenhanced thin-slice chest HRCT scans (A and B, respectively) in a 25-year-old male cannabis smoker, showing a large (5 cm) bulla (white arrows), sharply demarcated by a thin wall ...

2 Pulmonary and Critical Care Medicine, Department of Medicine, and Department of Cell Biology and Physiology, Washington University School of Medicine and Barnes-Jewish Hospital, St Louis, Missouri, ...