Fig. 7
From: Pulmonary Langerhans cell histiocytosis: the many faces of presentation at initial CT scan
PLCH presenting with nodular features that mimic other diseases. a PLCH referred to metastasis: a 44-year-old woman, smoker, with a medical history of carcinoma of cervix uteri, treated with surgery and chemotherapy. A 3-mm collimated CT performed during oncological follow-up shows some faint micronodules in both lungs (arrows). Definitive diagnosis of PLCH obtained by VATS. b PLCH mimicking sarcoidosis: a 41-year-old man, smoker, with asymptomatic PLCH and skull involvement. Diagnosis obtained by skull biopsy. A 3-mm collimated CT shows numerous millimetric nodules. Nodules are mostly spread at the upper and middle lung fields in a peripheral location; few are subpleuric