Pulmonary Langerhans cell histiocytosis PLCH

Pulmonary Langerhans cell histiocytosis (PLCH) is a rare disease of smokers often presenting as pneumothoraces or dyspnea (128-130). CT scans in PLCH shows numerous thin-walled cystic lesions, typically <10 mm in size however, cysts may coalesce, sometimes exceeding 5 cm and assume bizarre shapes... 

Figure 15 HRCT demonstrating numerous thin-walled cysts in the middle and upper lung zones in a patient with PLCH. Abbreviations HRCT, high-resolution computed tomography PLCH, pulmonary Langerhans cell histiocytosis.

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