10 results
Differential diagnosis on HRCT
Most of our knowledge about imaging findings in interstitial lung disease comes from
Differential diagnosis ... lung disease comes ... On a Chest X-Ray ... Diagnosis #Radiology #Pulmonary ... #Pattern #Differential
Radiographic Features of Pulmonary Diseases
 - Pneumonia
 - Atelectasis
 - Emphysema
 - Pneumothorax
 - Effusion
 -
Metastases - Interstitial ... Nodular - Acute Interstitial ... Diseases #Radiology #Patterns ... #Lung #CXR #XRay ... #ChestCT #Differential
Ground-glass opacity
Ground-glass opacity (GGO) represents:
- Filling of the alveolar spaces with pus, edema, hemorrhage, inflammation or
resolution of the HRCT ... lung disease (i.e ... in ground glass pattern ... Diagnosis #Radiology #Pulmonary ... #GroundGlass #Differential
Approach to the A-a Gradient
A-a gradient = PAO2 - PaO2
A-a gradient = [FiO2 x (Patm -
Weakness, Loss of Chest ... Elasticity (flail chest ... : Atelectasis, ARDS ... Lung Disease ... Hypoxia #hypoxemia #differential
Radiographic appearances of pulmonary diseases in HIV/AIDS Patients
 • Diffuse Interstitial Infiltrates: Pneumocystis jirovecii, M.tuberculosis, Histoplasma
edema; ARDS, Metastatic ... alveolar proteinosis ... Actinomyces spp., NHL; Lung ... #diseases #differential ... #diagnosis #chestCT
Septal thickening
Thickening of the lung interstitium by fluid, fibrous tissue, or infiltration by cells results in
Thickening of the lung ... cells results in a pattern ... Kerley B lines on chest ... or lymphoma and alveolar ... #HRCT #CTChest
UIP
UIP is a histologic pattern of pulmonary fibrosis.
On a chest X-ray UIP manifests as a reticular
of pulmonary fibrosis ... On a chest X-ray ... A HRCT is needed ... at the lung bases ... UIP #Reticular #Interstitial
Amiodarone Induced Lung Toxicity Summary

Who?
• 5% of patients
• Dose ≥ 400 mg per day

How?  Possible
organizing pneumonia, ARDS ... Pleuritic chest ... macrophages in alveolar ... reticular opacities on chest ... confirmatory findings on HRCT
Lung Infections in HIV - Differential Diagnosis Framework

Disease by CD4 Count:
Any CD4 Count:
 • Mycobacterium tuberculosis,
in HIV - Differential ... phagocytic function of alveolar ... fever, rales, interstitial ... Infections #HIV #AIDS ... #pulmonary #differential
Uncommon Causes of Noncardiogenic Pulmonary Edema (NCPE) - Differential Diagnosis Framework

High Altitude Pulmonary Edema:
 • Accumulation
Edema (NCPE) - Differential ... blood cells in the lung ... interstitium and ... alveoli thus increases ... respiratory failure or ARDS