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Approach to the diagnosis of chronic hypersensitivity pneumonitis. 
*Consider additional test: bronchoscopy with bronchoalveolar lavage, transbronchial
diagnosis of chronic hypersensitivity ... lung biopsy, transbronchial ... lung biopsy, transbronchial ... cHP = chronic hypersensitivity ... #hypersensitivity
Hypersensitivity: Summary
Type I Hypersensitivity:
 • Immunological Mediator: lgE
 • Immunological Target: Allergen Molecules
 • Ex: Antibiotic
Hypersensitivity ... Summary Type I Hypersensitivity ... Disease Type III Hypersensitivity ... sickness Type IV Hypersensitivity ... poison ivy) #Hypersensitivity
High-Res Chest CT Patterns - Differential Diagnosis Framework
Reticular:
 • Septal Thickening: Lymphangitic Carcinoma, Interstitial Edema, Alveolar
Centrilobular: Hypersensitivity ... Pneumonia, Acute Hypersensitivity ... Ground Glass: Hypersensitivity ... Scleroderma, End-Stage Hypersensitivity
Types of hypersensitivity reactions

Type I - lgE-Mediated, Within I Hour (Anaphylaxis)
Type II - IgG or IgM
Types of hypersensitivity ... happypillsrx/ #hypersensitivity
Exposure Related ILD

 • Hypersensitivity pneumonitis
 • Pneumoconioses 
 • Radiation pneumonitis
 • Medication-induced ILD

Andrew Sanchez
Related ILD • Hypersensitivity
Chronic hypersensitivity pneumonitis
The key findings in chronic hypersensitivity pneumonitis are:
Mosaic pattern with areas of ground-glass atenuation
Chronic hypersensitivity ... findings in chronic hypersensitivity ... patient with chronic hypersensitivity ... #CXR #CTChest #Hypersensitivity
#Entire #basic #immunology #medical #rheumatic #hypersensitivity #immunity
medical #rheumatic #hypersensitivity
Nodular pattern
1. Hypersensitivity pneumonitis: ill defined centrilobular nodules.
2. Miliary TB: random nodules
3. Sarcoidosis: nodules with perilymphatic
Hypersensitivity ... Hypersensitivity
Functional Dyspepsia - Signs, Symptoms and Pathophysiology
Delayed gastric emptying - Postprandial fullness, nausea, vomiting
Hypersensitivity to gastric
nausea, vomiting Hypersensitivity ... Duodenal lipid hypersensitivity ... Duodenal acid hypersensitivity
On the left some diseases with a nodular pattern.
1. Hypersensitivity pneumonitis: ill defined centrilobular nodules.
2. Miliary
Hypersensitivity ... Hypersensitivity