Pulmonary embolism refers to an embolus that lodges in the pulmonary circulation. Galectin-3 is upregulated in patients with idiopathic pulmonary fibrosis. Cardiac, pulmonary and neurological symptoms can be signs of refeeding syndrome. USA400 strain results in necrotizing pneumonia and pulmonary sepsis. These cases are associated with hypertension in the pulmonary arteries. Pirfenidone is a medication used for the treatment of idiopathic pulmonary fibrosis. PAH is diagnosed after exclusion of other possible causes of pulmonary hypertension. Surgical procedures are required in selective patients for drainage or pulmonary resection. Primary hypertrophic osteoarthropathy is HPOA without signs of pulmonary disease. It is subject to renal and pulmonary excretion. CPR is an algorithm-based intervention aimed to restore cardiac and pulmonary function. Imatinib was initially thought to have a potential role in the treatment of pulmonary hypertension. Examination of the lungs may reveal crackles, which are suggestive of pulmonary edema. Dexamethasone is in widespread use for the prevention of high altitude pulmonary edema. Kerley lines are a sign seen on chest radiographs with interstitial pulmonary edema.