Question:easy

Most common cause of hemoptysis worldwide is:

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Consider a disease with very high global prevalence, especially in developing countries, that erodes pulmonary blood vessels.
Updated On: Jun 23, 2026
  • Pulmonary tuberculosis
  • Bronchiectasis
  • Lung carcinoma
  • Mitral stenosis
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The Correct Option is A

Solution and Explanation

Hemoptysis -- Global Epidemiology and Causes

Most common worldwide: Pulmonary tuberculosis (TB)
Most common in developed countries: Bronchiectasis and carcinoma of the lung

Mechanisms of hemoptysis in TB:
  1. Erosion of bronchial artery branches by cavitating TB lesions (most common mechanism)
  2. Rasmussen aneurysm -- aneurysmal dilatation of a branch of the pulmonary artery within a TB cavity, can cause massive hemoptysis
  3. Secondary bronchiectasis from healed TB causing vessel erosion
  4. Aspergilloma colonizing old TB cavities causing mycetoma-related bleeding
Severity classification of hemoptysis:
  • Mild: <200 ml/24 hr
  • Moderate: 200-600 ml/24 hr
  • Massive (life-threatening): >600 ml/24 hr or >150 ml/hr
\[\boxed{\text{Most common cause of hemoptysis worldwide = Pulmonary Tuberculosis}}\]
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