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The PA-film shows a silhouette sign of the left heart border.
Even without looking at the lateral
PA-film shows a silhouette ... anteriorly in the left lung ... consolidation due to a pneumonia ... Sterptococcus pneumoniae ... Radiology #CXR #Pneumonia
Silhouette sign
This is a very important sign. It enables us to find subtle pathology and to
Silhouette sign ... of the normal silhouette ... lingula of the left lung ... the air in the lung ... When there is a pneumonia
Here a typical lobar consolidation.
First study the images, then continue reading.
The findings are:
increased density with ill-defined
borders in the left lung ... the heart silhouette ... in Klebsiella pneumoniae ... Streptococcus pneumoniae ... , TB and lung cancer
On a normal lateral chest film the silhouette of the left diaphragm 2- can be seen
chest film the silhouette ... bordered by the lung ... Radiology #CXR #Pneumonia
Lung Infections in HIV - Differential Diagnosis Framework

Disease by CD4 Count:
Any CD4 Count:
 • Mycobacterium tuberculosis,
Lung Infections ... macrophages in HIV • Lung ... : • Upper lung ... cough, myalgia • Lung ... Microsporidium #Lung
PA view
On the PA chest-film it is important to examine all the areas where the lung
areas where the lung ... these borders lung-soft ... Silhouette - for ... of the normal silhouette ... important mediastinal-lung
Pathogens in Pneumonia

Here is a quick review of the pathogens causing pneumonia (useful for enumerating differentials
Pathogens in Pneumonia ... pathogens causing pneumonia ... smoking. structural lung ... Burkholderia — structural lung ... MAC (structural lung
Interstitial Lung Diseases (ILD)
Exposure-Related ILD (a.k.a. extrinsic allergic alveolitis): 
 • Hypersensitivity pneumonitis, Farmer's lung, Bird
Interstitial Lung ... pneumonitis, Farmer's lung ... Bird fanciers' lung ... (coal workers' lung ... #Interstitial #Lung
Cryptogenic Organizing Pneumonia (COP)

Cryptogenic Organizing Pneumonia Overview:
 • Idiopathic form of organizing pneumonia
 • formerly BOOP
of organizing pneumonia ... of interstitial lung ... peripheries and lower lung ... Diagnosis: • Lung ... TBNA or Surgical lung
Characteristics of Selected Pneumonias

Streptococcus pneumoniae (pneumococcus). Gram-positive diplococci. 
Haemophilus influenzae. Pleomorphic gram-negative coccobacilli. 
Staphylococcus aureus. Plump
Characteristics of Selected Pneumonias ... Streptococcus pneumoniae ... Klebsiella pneumoniae ... Mycoplasma pneumoniae ... #Pneumonia #Patterns