13 results
Nodular pattern
1. Hypersensitivity pneumonitis: ill defined centrilobular nodules.
2. Miliary TB: random nodules
3. Sarcoidosis: nodules with perilymphatic
Nodular pattern ... pneumonitis: ill ... Miliary TB: random ... Clinical #Radiology #HRCT ... #Comparison #Table
Types of hypersensitivity reactions

Type I - lgE-Mediated, Within I Hour (Anaphylaxis)
Type II - IgG or IgM
Types of hypersensitivity ... reactions Type ... Ill - Immune Complex-Mediated ... happypillsrx/ #hypersensitivity ... #Classification
On the left some diseases with a nodular pattern.
1. Hypersensitivity pneumonitis: ill defined centrilobular nodules.
2. Miliary
with a nodular pattern ... Hypersensitivity ... Miliary TB: random ... Hypersensitivity ... Differential #Comparison #Table
Upper lung zone preference is seen in:
- Inhaled particles: pneumoconiosis (silica or coal)
- Smoking related diseases
bronchiolitis (RB-ILD ... histiocytosis - Hypersensitivity ... Radiology #Pulmonary #HRCT ... #Differential #Table
Hypersensitivity Types and Their Mechanisms
Type I - lgE - Soluble antigen
 - Allergen-specific lgE antibodies bind
Hypersensitivity ... Type Ill - IgG and ... sclerosis #Hypersensitivity ... #Types #Classification ... Diagnosis #Reactions #Table
Odontoid Fractures 
Type I  [Stable]  - Avulsion of the tip 
Type II [Unstable] -
Odontoid Fractures Type ... I [Stable] - ... most common) Type ... Ill [Unstable] ... #Classification
Summary table of types of hypersensitivity reactions. 
Type 1
 - Mediators: lgE
 - Antigen Form: Soluble
Summary table of ... types of hypersensitivity ... Graft rejection #hypersensitivity ... #allergy #table ... #classification
Figure 3 HRCT-LUS correlation in normal lung, pulmonary congestion, rheumatoid lung disease, idiopathic pulmonary fibrosis.
Notes: (A)
Figure 3 HRCT-LUS ... artifact); (G) UIP pattern ... Clinical #Diagnosis #HRCT ... #Correlation #Table ... #ILD #Findings
Basic Interpretation
A structured approach to interpretation of HRCT involves the following questions:
What is the dominant HR-pattern:
reticular
nodular
high
interpretation of HRCT ... the dominant HR-pattern ... perilymphatic or random ... Radiology #Pulmonary #HRCT ... Interpretation #Algorithm #ILD
Cryptogenic Organizing Pneumonia (COP)

Cryptogenic Organizing Pneumonia Overview:
 • Idiopathic form of organizing pneumonia
 • formerly BOOP
formerly BOOP • Type ... consolidation and GG pattern ... , cavities • HRCT ... interstitial pneumonia’s, Hypersensitivity ... BOOP #pulmonary #ILD