16 results
Lung Infections in HIV - Differential Diagnosis Framework

Disease by CD4 Count:
Any CD4 Count:
 • Mycobacterium tuberculosis,
Lung Infections ... in HIV - Differential ... • CT: Halo sign ... Abdominal pain, chronic ... AIDS #pulmonary #differential
Septic emboli
Septic emboli usually present as multiple ill-defined nodules.
In about 50% cavitation is seen.
CT demonstrates more
CT demonstrates ... in the proper clinical ... feeding vessel sign ... feeding vessel sign ... #Clinical #Radiology
Lobar pneumonia
On the chest x-ray there is an ill-defined area of increased density in the right
On the chest x-ray ... there is an ill-defined ... weight loss or long ... list of causes of chronic ... #Clinical #Radiology
Tram Track Sign on Chest CT
 • Parallel, non-tapering airways, extending to the lung periphery.
 •
on Chest CT • Parallel ... bronchiectasis, CF, ILD ... #CT #Lung #Pulmonary ... #diagnosis #radiology ... #clinical
Air Bronchogram Sign on Chest CT
 • Patent airways surrounded by opacified lung
 • DDx: pna,
on Chest CT • ... edema, severe ILD ... #CT #Lung #Pulmonary ... #diagnosis #radiology ... #clinical
Notice that there are multiple densities in both lungs.
The larger ones are ill-defined and maybe there
densities in both lungs ... month history of chronic ... dealing with the differential ... diagnosis of chronic ... #Clinical #Radiology
Miliary Pattern - Chest Radiology
 • Miliary opacities are scattered, small (1 -4 mm) nodules
 •
throughout the lungs ... rarely typical pneumonia ... #Radiology #differential ... pulmonary #CXR #clinical ... #CT
Lung Abscess - Diagnosis and Management Summary

Lung Abscess Etiology:
 • Necrosis of lung parenchyma by a
Chronic alcoholism ... Lung Abscess - Clinical ... CT Lung Abscess ... Abscess Differential ... Abscess #pulmonary #differential
UIP with honeycombing (left) and chronic HP (right)
Differential diagnosis of Hypersensitivity Pneumonitis.
Subacute stage:
- RB-ILD: seen in
HP (right) Differential ... Subacute stage: - RB-ILD ... throughout the whole lung ... #Clinical #Diagnosis ... #Radiology #CTChest
Common Variable Immunodeficiency (CVID)

What?
CVID: Immunodeficiency disorder with hypogammaglobulinemia -> increased infection risk secondary to impaired B-cell
to 8 years Clinical ... Autoimmunity • Chronic ... lung disease ... Chest CT: • Ground-glass ... community-acquired infections: Pneumonia