21 results
Vasculitis and Vasculitides - Differential Diagnosis Framework

When to Consider Vasculitis:
 • Purpura, ischemic skin lesions
 •
often involved • Hypocomplementemic ... Urticaria and hypocomplementemia ... (Granulomatous disease ... against MPO • Complement ... #rheumatology #classification
Causes of Bleeding / Bruising - Differential Diagnosis Algorithm
Thrombocytopenia - Quantitative Defect
 • Decreased Production
 •
Causes of Bleeding ... Differential Diagnosis Algorithm ... • Steroids • Vasculitis ... Coagulation #Bleeding ... Differential #Diagnosis #Algorithm
Rapidly Progressive Glomerulonephritis (RPGN)
RPGN has three primary pathophysiologic causes differentiated by immunofluorescence

Immune Complex Mediated (granular staining):
staining): • Low Complement ... Idiopathic • Normal Complement ... involvement: Anti-GBM Disease ... Glomerulonephritis #Vasculitis ... differential #diagnosis #algorithm
Cryoglobulinemia Summary

Cryoglobulins:
 • Cryoglobulins are Igs in the serum that precipitate in vitro at temperatures below
immune system, leading ... • Autoimmune diseases ... • Low serum C4 complement ... • Vasculitis ... diagnosis #types #classification
Hemolytic Anemia - Differential Diagnosis Algorithm
 • Sickle cells - Consider sickle cell disease (diverse genotypes):
Differential Diagnosis Algorithm ... Consider sickle cell disease ... cardiac valve, vasculitis ... Differential #Diagnosis #Algorithm ... workup #hematology #testing
Causes of Anemia by Mean Corpuscular Volume (MCV) - Differential Diagnosis Algorithm
Low Mean Corpuscular Volume (<80
Differential Diagnosis Algorithm ... 80-100 fL) • Bleeding ... Renal Disease, Liver ... #Anemia #MCV #Classification ... Differential #Diagnosis #Algorithm
Hypersensitivity Types and Their Mechanisms
Type I - lgE - Soluble antigen
 - Allergen-specific lgE antibodies bind
cellular antigen, leading ... to complement activation ... during hemolytic disease ... Complement activation ... Hypersensitivity #Types #Classification
Cold Agglutinin Disease

3 Types of Cold Sensitive Antibodies:
  1. Cold Agglutinins (CAD)
  2. Donath-Landsteiner
Cold Agglutinin Disease ... Cryoglobulins (Vasculitic ... Positive Coombs testing ... post infectious setting ... temperatures by fixing complement
Summary table of types of hypersensitivity reactions. 
Type 1
 - Mediators: lgE
 - Antigen Form: Soluble
cell antigens, leading ... to complement activation ... reaction, Haemolytic disease ... they activate complement ... allergy #table #classification
Bleeding and Bruising - Disorders of Hemostasis - Differential Diagnosis Framework

== Quantitative or Qualitative defect in
Von Willebrand’s disease ... Von Willebrand disease ... Von Willebrand disease ... fibrinogen levels, and testing ... integrity == • Vasculitis