Fig. 10
From: Pulmonary Langerhans cell histiocytosis: the many faces of presentation at initial CT scan
A 68-year-old woman, smoker, symptomatic with excertional dyspnea. Definitive diagnosis obtained by VATS performed at time of b. a A 1-mm collimated CT shows focal air spaces that appear as emphysema. A faint micronodule is also present (arrow). b A 1-mm collimated CT 9 months after a with no smoking cessation demonstrates transformation and progression of focal air spaces that now appear as irregular cystic lesions surrounded by ground-glass opacities. Some scattered nodules coexist. c At 3-year follow-up, HRCT scans show cystic disease progression with some non-walled cysts. Parenchymal infiltrates have regressed