20 results
Hypersensitivity: Summary
Type I Hypersensitivity:
 • Immunological Mediator: lgE
 • Immunological Target: Allergen Molecules
 • Ex: Antibiotic
anemia, Penicillin-induced ... Gravis, Graves' Disease ... complexes • Ex: Systemic ... Lupus Erythematosus ... #Types #Classification
Warm Antibody Autoimmune Hemolytic Anemia 
1) DIAGNOSE AIHA
 • Anemia: macrocytic > normocytic, ↑ reticulocytes
 •
Coombs • IgG type ... • Blood smear: Differential ... 2) LOOK FOR a cause ... → Systematic screening ... management #treatment #rheumatology
Hypersensitivity Types and Their Mechanisms
Type I - lgE - Soluble antigen
 - Allergen-specific lgE antibodies bind
or during hemolytic ... disease of the ... lupus erythematosus ... - Contact dermatitis ... #Classification
Pancytopenia - Differential Diagnosis

Congenital Diseases:
• GATA2 deficiency
• Fanconi’s anemia
• Wiskott-Aldrich syndrome
• Ribosomopathy or telomeropathy

Cancer:
• Leukemia
• Lymphoma

Inflammatory
deficiency • Fanconi’s anemia ... : • Systemic lupus ... erythematosus ... Antibody-mediated hemolysis ... #Diagnosis #Hematology
Causes of Splenomegaly - Differential Diagnosis Algorithm
Infectious
 • Bacterial
 • Viral (EBV)
 • Parasitic
 • Fungal
Congestive
- Differential ... Inflammatory • Systemic ... Lupus Erythematosus ... Serum Sickness Hemolytic ... #Hematology
Causes of Anemia by Mean Corpuscular Volume (MCV) - Differential Diagnosis Algorithm
Low Mean Corpuscular Volume (<80
Causes of Anemia ... Volume (MCV) - Differential ... • Bleeding • Hemolysis ... #MCV #Classification ... #Hematology
Differential Diagnosis for Hemolytic Anemia
Intrinsic Causes:
 • Enzyme deficiencies ex. G6PD, pyruvate kinase 
 • Hemoglobinopathies
for Hemolytic Anemia ... : • Liver disease ... #Anemia #Differential ... #classification ... #hematology
Summary table of types of hypersensitivity reactions. 
Type 1
 - Mediators: lgE
 - Antigen Form: Soluble
lgE causes mast-cell ... disease of the ... glomerulonephritis, Systemic ... lupus erythematosus ... #classification
Systemic Lupus Erythematosus - Diagnosis
Manifestations:
 - Arthritis 69%
 - Malar rash 40%
 - Fever 36%
 -
Systemic Lupus Erythematosus ... Lymphadenopathies 7% - Hemolytic ... anemia 4% - Myositis ... #Lupus #Erythematosus ... #rheumatology
Causes of Hypocomplementemia - CHAMPS Mnemonic
C - Cryoglobulinemia (85%), C3 glomerulopathy, cirrhosis
H - Heavy Chain deposition
Causes of Hypocomplementemia ... Chain deposition disease ... Lupus Erythematosus ... Mnemonic #diagnosis #differential ... #hematology