11 results
Vasculitis and Vasculitides - Differential Diagnosis Framework

When to Consider Vasculitis:
 • Purpura, ischemic skin lesions
 •
tract, and often causes ... often involved • Hypocomplementemic ... Urticaria and hypocomplementemia ... against MPO • Complement ... #rheumatology #classification
Summary table of types of hypersensitivity reactions. 
Type 1
 - Mediators: lgE
 - Antigen Form: Soluble
Summary table of ... types of hypersensitivity ... Allergen-specific lgE causes ... types #allergy #table ... #classification
Rapidly Progressive Glomerulonephritis (RPGN)
RPGN has three primary pathophysiologic causes differentiated by immunofluorescence

Immune Complex Mediated (granular staining):
pathophysiologic causes ... staining): • Low Complement ... Idiopathic • Normal Complement ... Glomerulonephritis #Vasculitis ... differential #diagnosis #algorithm
Hypersensitivity Types and Their Mechanisms
Type I - lgE - Soluble antigen
 - Allergen-specific lgE antibodies bind
Hypersensitivity ... antigen, leading to complement ... Complement activation ... #Types #Classification ... Diagnosis #Reactions #Table
Cryoglobulinemia Summary

Cryoglobulins:
 • Cryoglobulins are Igs in the serum that precipitate in vitro at temperatures below
• They can cause ... Cryoglobulins Cause ... • Low serum C4 complement ... • Hypersensitivity ... diagnosis #types #classification
Shock - Differential Diagnosis by Classification
Reflex Syncope 
 - Vasovagal syncope
   • Prolonged standing
Differential Diagnosis by Classification ... Carotid sinus hypersensitivity ... bradycardia • Sinus pauses ... Differential #Diagnosis #Classification ... #Table #Causes
Vasculitis - Differential Diagnosis Framework

When to Consider Vasculitis:
• Purpura, ischemic skin lesions
• Mononeuritis multiplex
• Hematuria, proteinuria,
Vasculitis - Differential ... tract, and often causes ... Elevated AST ALT • Hypocomplementemia ... ) • Hypocomplementemic ... inflammation Hypersensitivity
Causes of ileitis beyond Crohn’s disease and infections include systemic disorders -spondyloarthropathies, vasculitides, ischemia, and amyloidosis
Causes of ileitis ... spondyloarthropathies, vasculitides ... See below for table ... helpful paper complements ... #Differential #Table
Erythemas Summarized
Erythema ab igne
 • A dermatosis that results from repeated exposure to heat (fires, heating
of delayed-type hypersensitivity ... potential inciting causes ... Haverhill fever caused ... of necrotizing vasculitis ... Erythemas #comparison #table
Monoclonal Gammopathy of Renal Significance (MGRS)

MGRS
• MGRS refers to kidney disease caused by nephrotoxic monoclonal immunoglobulins
kidney disease caused ... Clinical Clues: ... guide subtype classification ... tubulopathy) - Complement ... formation causing vasculitis