Lung Fibrosis

Key points

• Lung fibrosis It is important in the exam to be able to differentiate between conditions causing predominately upper or lower zone fibrosis. It should be noted that the more common causes (idiopathic pulmonary fibrosis,
• hypersensitivity pneumonitis (also known as extrinsic allergic alveolitis)
• coal worker's pneumoconiosis/progressive massive fibrosis
• ankylosing spondylitis (rare)
• histiocytosis