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The idiopathic interstitial pneumonias (IIPs) comprise a heterogenous group of disorders. 
They represent fundamental responses of
not represent 'diseases ... diseases. ... #Diagnosis #Radiology ... #Pulmonary #CTChest ... #ILD #Findings
Radiographic Features of Pulmonary Diseases
 - Pneumonia
 - Atelectasis
 - Emphysema
 - Pneumothorax
 - Effusion
 -
Diseases - Pneumonia ... Pneumothorax - Effusion ... #Diseases #Radiology ... #Patterns #Lung ... #Differential #Diagnosis
The fourth pattern includes abnormalities that result in decreased lung attenuation or air-filled lesions.
These include:
- Emphysema
-
attenuation or ... Honeycombing Most diseases ... basis of HRCT findings ... #Diagnosis #Radiology ... #Pulmonary #CTChest
CT Lung Signs in Pulmonary Diseases - One Page Summary of Pulmonary Signs
 - Air Crescent
CT Lung Signs in ... Pulmonary Diseases ... - Mosaic attenuation ... #Diseases #diagnosis ... #differential #radiology
Pulmonary Pathology and Associated Lung Ultrasound Findings
Pneumothorax:
 - No lung sliding/barcode sign
 - Lung point (hard
sliding/barcode ... sign - Lung point ... pleura reflection) Pneumonia ... #differential #diagnosis ... #signs #Lung #POCUS
Radiographic appearances of pulmonary diseases in HIV/AIDS Patients
 • Diffuse Interstitial Infiltrates: Pneumocystis jirovecii, M.tuberculosis, Histoplasma
diseases in HIV ... ARDS, Metastatic disease ... • Cavitary disease ... Infectious Diseases ... #radiology
Differential diagnosis on HRCT
Most of our knowledge about imaging findings in interstitial lung disease comes from
lung disease comes ... , high and low attenuation ... lung disease and ... #Diagnosis #Radiology ... #Pulmonary #CXR
Ground-glass opacity
Ground-glass opacity (GGO) represents:
- Filling of the alveolar spaces with pus, edema, hemorrhage, inflammation or
space disease ( ... lung disease (i.e ... bronchiolitis #Diagnosis ... #Radiology #Pulmonary ... #CTChest #GGO #
Approach to the A-a Gradient
A-a gradient = PAO2 - PaO2
A-a gradient = [FiO2 x (Patm -
Disease, Interstitial ... Disease and more ... , Interstitial Lung ... Disease Unremarkable ... #differential #diagnosis
Lung Infections in HIV - Differential Diagnosis Framework

Disease by CD4 Count:
Any CD4 Count:
 • Mycobacterium tuberculosis,
Framework Disease ... angioinvasive disease ... • CT: Halo sign ... , pleural effusion ... fever, rales, interstitial