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Based on the images alone, it is usually not possible to determine the cause of the
determine the cause ... Lobar pneumonia ... nodular interstitial lung ... #Clinical #Diagnosis ... #Radiology #CXR
The PA-film shows a silhouette sign of the left heart border.
Even without looking at the lateral
anteriorly in the left lung ... This was a consolidation ... caused by Sterptococcus ... pneumoniae. ... #Clinical #Radiology
Reversed Halo Sign - Infectious and Non-Infectious Differential Diagnosis
Definition: A focal rounded area of GGO surrounded
complete ring of consolidation ... • Infectious Causes ... Non-Infectious Causes ... Dermatomyositis, Lung ... #pulmonary
It is very important to differentiate between acute consolidation and chronic consolidation, because it will limit
the differential diagnosis ... post-obstructive pneumonia ... - Lung neoplasms ... #Diagnosis #Radiology ... #Pulmonary #CXR
Here are the most common examples of these four patterns on a chest x-ray (click image
Consolidation - ... mass - Solitary Pulmonary ... Nodule - Multiple Masses ... Atelectasis #Diagnosis ... #Clinical #Radiology
Differential diagnosis
The table summarizes the most common diseases, that present with consolidation.
Chronic diseases are indicated in
Differential diagnosis ... the differential diagnosis ... caused by streptococcus ... #Diagnosis #Radiology ... #Pulmonary #CXR
Lobar pneumonia
On the chest x-ray there is an ill-defined area of increased density in the right
weight loss or long ... include the list of causes ... of chronic consolidation ... caused by Streptcoccus ... #Clinical #Radiology
Cryptogenic Organizing Pneumonia (COP)

Cryptogenic Organizing Pneumonia Overview:
 • Idiopathic form of organizing pneumonia
 • formerly BOOP
Unknown • 6-7 cases ... - Diagnosis: ... , Pulmonary lymphoma ... #COP #BOOP #pulmonary ... #ILD #diagnosis
Lung Infections in HIV - Differential Diagnosis Framework

Disease by CD4 Count:
Any CD4 Count:
 • Mycobacterium tuberculosis,
- Differential Diagnosis ... dyspnea • Lobar consolidation ... factor • May cause ... Infections #HIV #AIDS #pulmonary ... #differential #diagnosis
Interstitial Lung Diseases (ILD)
Exposure-Related ILD (a.k.a. extrinsic allergic alveolitis): 
 • Hypersensitivity pneumonitis, Farmer's lung, Bird
ILD caused by inhalation ... • Idiopathic pulmonary ... Diseases #ILD #diagnosis ... #differential #pulmonary ... #causes