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