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Vasculitis and Vasculitides - Differential Diagnosis Framework

When to Consider Vasculitis:
 • Purpura, ischemic skin lesions
 •
often involved • Hypocomplementemic ... Urticaria and hypocomplementemia ... and branches • GCA ... against MPO • Complement ... #rheumatology #classification
Cryoglobulinemia Summary

Cryoglobulins:
 • Cryoglobulins are Igs in the serum that precipitate in vitro at temperatures below
activate the immune system ... arthralgia, and arthritis ... • Low serum C4 complement ... disorder (e.g. systemic ... #classification
Vasculitis - Differential Diagnosis Framework

When to Consider Vasculitis:
• Purpura, ischemic skin lesions
• Mononeuritis multiplex
• Hematuria, proteinuria,
Diagnosis: • Systemic ... Elevated ESR and CRP GCA ... develop in pts with GCA ... Elevated AST ALT • Hypocomplementemia ... ) • Hypocomplementemic
Hypersensitivity Types and Their Mechanisms
Type I - lgE - Soluble antigen
 - Allergen-specific lgE antibodies bind
- Local and systemic ... Complement activation ... glomerulonephritis, rheumatoid arthritis ... , and systemic lupus ... #Classification
Summary table of types of hypersensitivity reactions. 
Type 1
 - Mediators: lgE
 - Antigen Form: Soluble
antigens, leading to complement ... they activate complement ... Examples: Rheumatoid arthritis ... glomerulonephritis, Systemic ... allergy #table #classification
SLE (Systemic Lupus Erythematosus)

Suspect:
Clinical evidence of (fatigue, rash, photosensitivity, inflammatory arthritis, weight loss, and fever) and
SLE (Systemic Lupus ... anti-Smith Ab, low complements ... Skin Disease Classification ... Kikuchi disease • Type-I ... RNP antibodies, Complement
Sweet Syndrome

Acute febrile neutrophilic dermatosis (Sweets Syndrome) is a skin condition characterized by fever and inflamed
associated with systemic ... Musculoskeletal system ... lymphoma, breast CA ... such as certain types ... Leukocytoclastic vasculitis
Sjogren's Syndrome Overview

Epidemiology:
• F > M: 9:1
• 5-6th Decades (can be any age)

Autoimmune exocrinopathy multisystemic disease
Cytopenia: 2% • Hypocomplementemia ... IV RTA, TYPE I ... ) • Cutaneous vasculitis ... Vasculitis: • ... Arthralgia and Arthritis