Pneumonia

The radiological pattern of pneumonia helps in suspecting the etiology. The most common causes for each radiological presentation is as follows.:

Lobar Pneumonia  
  1. Pneumococcus 
  2. Mycoplasma 
  3. Gram negative organisms 
  4. Legionella 
Bronchopneumonia
  1. Streptococcus 
  2. Viral 
  3. Staph 
Necrotizing Pneumonia
  1. Staphylococcal
  2. Anaerobic infection 
  3. Gram negative organisms 
Segmental Pneumonia
  1. Post obstructive 
  2. Aspiration 
Round Pneumonia
  1. Fungal 
  2. Tuberculous 
Diffuse Alveolar Pneumonia
  1. Pneumocystis 
  2. Cytomegalovirus 
Diffuse Interstitial Pneumonia
  1. Viral 
  2. Chickenpox
Radiation port
  1. Radiation pneumonia