Jay Ryu

All articles by Jay Ryu

Pulmonary Langerhans Cell Histiocytosis


What every physician needs to know: Pulmonary Langerhans cell histiocytosis (PLCH) is a rare and typically smoking-related interstitial lung disease that is characterized by proliferation of Langerhans cells and associated nodular and cystic changes in the lung parenchyma. Classification PLCH encountered in adults should be distinguished from other forms of Langerhans cell histiocytosis, particularly those…

Bronchiolitis (respiratory bronchiolitis, acute bronchiolitis, constrictive or obliterative bronchiolitis, follicular bronchiolitis, diffuse panbronchiolitis, diffuse aspiration bronchiolitis, mineral dust airway disease)


What every physician needs to know: Bronchiolitis, also referred to as bronchiolar disease, is a generic term used to describe inflammation of the bronchioles, with or without scarring. Bronchiolitis, a common condition in the lung, is encountered in a variety of clinical contexts. Several histologic types of bronchiolitis (“primary” bronchiolar diseases) are recognized and have…

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