Fig. 9
From: Pulmonary Langerhans cell histiocytosis: the many faces of presentation at initial CT scan
Diseases requiring differentiation from PLCH when cavitary nodules are the main presenting feature. a Septic pulmonary embolism in a critically ill patient with endocarditis. A 3-mm collimated CT scan demonstrates both a few solid and cavitary scattered nodules, compatible with haematogenous seeding; some consolidative opacities are also present on the left lung. b Biopsy-confirmed Wegener’s disease in a 67-year-old man with systemic symptoms and dry cough. A 3-mm CT scan shows two pulmonary nodules (arrows), one of which is cavitated, bilateral bronchiectatic changes and an ill-defined ground glass opacity in the right lung. c Cavitating metastasis in a 68-year-old man with hilar cholangiocarcinoma at onset. A 3-mm collimated CT scan reveals numerous solid and cavitary small nodules, showing relatively thin walls