Pulmonary Langerhans� Cell Histiocytosis (PLCH) is a rare interstitial lung disease with characteristic radiological\r\nfeatures on high resolution computed tomography (HRCT). The diagnosis is usually delayed as the illness is either\r\nasymptomatic or has mild symptoms in the initial stage. We present a case of 54 yrs old smoker who presented\r\nwith acute febrile illness associated with cough and sputum production due to upper respiratory tract infection. A\r\nsubtle abnormality on chest X-ray led to the performance of HRCT chest showing few tiny nodules which progressed\r\non repeat HRCT after a period of observation. A thoracoscopic lung biopsy confirmed the diagnosis of Pulmonary\r\nLangerhans� Cell Histiocytosis (PLCH). This case represents an earliest radiological stage of PLCH.
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