Fig. 11
From: Pulmonary Langerhans cell histiocytosis: the many faces of presentation at initial CT scan
Cystic PLCH compared with LAM a, b A 22-year-old woman hospitalised for pneumothorax. Medical history was negative for respiratory disease. Definitive diagnosis of PLCH obtained by VATS performed within a month of imaging. HRCT scans show numerous thin-walled cysts of mostly ovoid and polygonal shape with a nearly imperceptible predominant craniocaudal distribution. Persistence of a small pneumothorax is shown. c, d Biopsy-confirmed LAM in two young female patients. A 3-mm collimated CT scan shows diffuse (c) and mild (d) pulmonary involvement of thin-walled cysts randomly distributed throughout both lungs, with some faint micronodules (arrows) (compare d with Fig. 1)