13 results
Types of hypersensitivity reactions

Type I - lgE-Mediated, Within I Hour (Anaphylaxis)
Type II - IgG or IgM
Types of hypersensitivity ... reactions Type ... #reactions #Types ... #Classification ... #Allergy #Diagnosis
Hypersensitivity: Summary
Type I Hypersensitivity:
 • Immunological Mediator: lgE
 • Immunological Target: Allergen Molecules
 • Ex: Antibiotic
Penicillin-induced drug reaction ... Dermatitis (ie. reaction ... Allergy #Allergic #Reactions ... #Types #Classification ... #Diagnosis #Definitions
Hypersensitivity Types and Their Mechanisms
Type I - lgE - Soluble antigen
 - Allergen-specific lgE antibodies bind
Hypersensitivity ... or during hemolytic ... #Types #Classification ... Pathophysiology #Allergy #Diagnosis ... #Reactions #Table
Vesiculobullous Skin Rash - Differential Diagnosis Algorithm
Vesicles Fragile/EasiIy Ruptured - Intraepidermal blisters, possibly crusts/erosions
 - Inflammatory
- Differential Diagnosis ... Algorithm Vesicles ... to Agent ... to Agent ... Vesiculobullous #SkinRash #dermatology
Differential Diagnosis for Hemolytic Anemia
Intrinsic Causes:
 • Enzyme deficiencies ex. G6PD, pyruvate kinase 
 • Hemoglobinopathies
Differential Diagnosis ... Malaria • Oxygen agents ... • Transfusion reactions ... #causes #classification ... #hematology
Hypersensitivity: Definitions
 • Type I - Production of lgE Abs that bind to harmless allergens and
Hypersensitivity ... Definitions • Type ... #Hypersensitivity ... #Types #Classification ... #Diagnosis #Definitions
Approach to Thrombocytosis - Elevated Platelet Count - Differential Diagnosis Algorithm

Peripheral Smear concerning for malignancy?
- Differential Diagnosis ... Algorithm Peripheral ... myelosuppressive agents ... #Differential #Diagnosis ... #Algorithm #hematology
Basophilia - Differential Diagnosis Framework

Basophils < 1% of the total white blood cell count
Basophils function similarly
- Differential Diagnosis ... which are released during ... an allergic reaction ... basophilic leukemia Hypersensitivity ... #causes #hematology
Allergic Bronchopulmonary Aspergillosis (ABPA)
WHAT IS IT?
Hypersensitivity response to Aspergillus fumigatus in the airways
 • Primarily affects
Hypersensitivity ... • Immediate type-skin ... reaction to Aspergillus ... with an azole agent ... ABPA #pulmonary #diagnosis
Classification of Jaundice
Unconjugated hyperbilirubinemia (predominantly indirect bilirubin)
 • Increased bilirubin production (eg, hemolytic anemias, hemolytic reactions,
Classification of ... syndrome, drug reactions ... or mutation in genes ... coding for bile ... #diagnosis #conjugated