Pulmonary hemorrhage

Pulmonary hemorrhage, also lung hemorrhage, is a potentially serious conditions with a large number of possible underlying causes.

General

• Many causes.

A few causes:

• Trauma.
• Acute bronchopneumonia.
• Lung cancer, e.g. lung adenocarcinoma.
• Pulmonary hypertension.
• Infection, e.g. tuberculosis.
• Bronchiectasis.

Pulmonary hemorrhage syndromes:

• Goodpasture syndrome.
• Idiopathic pulmonary hemosiderosis.
• Vasculitis-associated hemorrhage (hypersensitivity angiitis, Wegener's granulomatosis).
• Systemic lupus erythematosus.

Radiology

• Airspace opacity.

Microscopic

Features:

• Red blood cells in the airspaces - abundant.
• +/-Siderophages (hemosiderin-laden macrophages).
  • Can count (distinct) granules (unlike in smoker's macrophages).

DDx:

• Decomposition.

Images

• 

  HLM - high mag. (WC)

• 

  HLM - very high mag. (WC)

• 

  HLM - very high mag. (WC)

See also

• Medical lung diseases.
• Interstitial lung disease.