Occult pulmonary lymphangitic carcinomatosis presenting as 'chronic cough' with a normal HRCT chest.

A diagnosis of 'chronic cough' (CC) requires the exclusion of sinister pulmonary pathology, including infection and malignancy. We present a patient with a 3 month history of CC who had an extensive workup including a normal high resolution computed tomography of the chest (HRCT) 6 weeks prior to consultation at our center. He subsequently developed constitutional symptoms including weight loss and loss of appetite 5 weeks after initial consultation.

Cavitating Lung Disease: A Novel Presentation of IgG4-Related Disease.

Background: Immunoglobulin (Ig) G4-related disease, previously referred to as IgG4-related sclerosing disease or hyper-IgG4 disease, may occur in the lung, involving alveolar parenchyma, airways, and pleura. Various pulmonary manifestations of IgG4-related disease have been reported, but to the best of our knowledge a cavitating lung disease has not been reported previously.

Case Report: We describe a 60-year-old man who presented with hemoptysis and cavitating lung disease with clinical, laboratory, and histopathologic findings compatible with IgG4-related disease.

Diffuse interstitial lung infiltrates in a smoker with human immunodeficiency virus infection.

Pulmonary Langerhans cell histiocytosis is a rare interstitial lung disease characteristically affecting middle-aged smokers. It has unpredictable clinical course and may be associated with malignant neoplasms. Opportunistic lung infections are frequently considered when patients with Human immunodeficiency virus (HIV) infection present with respiratory symptoms and an abnormal chest X-ray.