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Lung Segment Anatomy Annotated on Chest CT
Right Lung:
 • Upper Lobe: Apical, Posterior, Anterior
 • Middle
Lung Segment Anatomy ... Chest CT Right Lung ... Posterior Left Lung ... Lung: • Upper ... lang=us #Lung #
Lobar pneumonia
On the chest x-ray there is an ill-defined area of increased density in the right
Lobar pneumonia ... the right upper lobe ... most likely a lobar ... weight loss or long ... This was an acute lobar
Left lower lobe atelectasis - There is a triangular density seen through the cardiac shadow.
This must
Left lower lobe ... this is lower lobe ... see the lower lobe ... the atelectatic lobe ... Radiology #CXR #LLL #Lobar
Cystic Lung Disease
Upper Lobe Predominant: 
Langerhans Cell Histiocytosis, Pneumocystis Jiroveci, Hypersensitivity Pneumonitis, Neurofibromatosis Type 1, Paracoccidioidomycosis,
Cystic Lung Disease ... Upper Lobe Predominant ... Disease Lower Lobe ... nickmmark #Cystic #Lung
There is a hydropneumothorax.
Notice the air-fluid level (blue arrow).
The upper lobe is still attached to the
The upper lobe is ... There is a lung ... cyst in the upper lobe ... with a cystic lung ... LAM is a rare lung
Whenever you see an area of increased density within the lung, it must be the result
density within the lung ... substances resulting in lobar ... tissue of the lung ... a part of the lung
When auscultating, you want to start in the same place every time, typically the patient’s right
’s right upper lobe ... the left upper lobe ... #auscultation #lung
Pneumonia on Chest Xray and POCUS

Extensive pneumonia in lower left lobe (red arrow). 
POCUS: Dynamic air
in lower left lobe ... Comparison #Clinical #Lung
Lung Infections in HIV - Differential Diagnosis Framework

Disease by CD4 Count:
Any CD4 Count:
 • Mycobacterium tuberculosis,
Lung Infections ... and dyspnea • Lobar ... infiltrates or lobar ... cough, myalgia • Lung ... Microsporidium #Lung
Based on the images alone, it is usually not possible to determine the cause of the
Lobar pneumonia ... nodular interstitial lung ... Radiology #CXR #Lobar