12 results
Pathophysiology of Hypocomplementemic Urticarial Vasculitis

C1q/anti-C1q antibiody ->
Immune Complex Formation - Complement Pathway Activation (C3a and C5a)
Pathophysiology of Hypocomplementemic ... Complex Formation - Complement ... TerrierBen #Hypocomplementemic ... Urticarial #Vasculitis #HUV
Causes of Hypocomplementemia - CHAMPS Mnemonic
C - Cryoglobulinemia (85%), C3 glomerulopathy, cirrhosis
H - Heavy Chain deposition
Causes of Hypocomplementemia ... A - Atypical HUS ... @AnnKumfer #Hypocomplementemia ... #Low #Complement
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
Causes of Fever of Unknown Origin (FUO) - Differential Diagnosis Algorithm
Neoplasm:
• NHL
• Hodgkin's lymphoma
• Leukemia
• Solid
Causes of Fever ... Differential Diagnosis Algorithm ... Infection: • HIV ... Differential #Diagnosis #Algorithm ... #causes
Causes of Extravascular and Intravascular Hemolysis - Differential Diagnosis Algorithm
Extravascular - Spleen and RES-mediated hemolysis
 -
Causes of Extravascular ... Differential Diagnosis Algorithm ... perfringens - Complement-Mediated ... MAHA (TTP, DIC, HUS ... #Causes #Hematology
Causes of Acute Onset Fever - Differential Diagnosis Algorithm
Viral:
 • Rhinovirus
 • Influenza Virus
 • Parainfluenza
Causes of Acute ... Diagnosis Algorithm ... Coronavirus • HIV ... Differential #Diagnosis #Algorithm ... #causes
Vasculitis - Differential Diagnosis Framework

When to Consider Vasculitis:
• Purpura, ischemic skin lesions
• Mononeuritis multiplex
• Hematuria, proteinuria,
Vasculitis: • Fevers ... HTN • Check: HBV ... tract, and often causes ... Elevated AST ALT • Hypocomplementemia ... Vasculitis) • Hypocomplementemic
Summary table of types of hypersensitivity reactions. 
Type 1
 - Mediators: lgE
 - Antigen Form: Soluble
Allergen-specific lgE causes ... Anaphylaxis, Hay fever ... antigens, leading to complement ... they activate complement ... allergy #table #classification
Hemolytic Anemia - Differential Diagnosis Algorithm
Hereditary:
 • Peripheral blood smear + DAT + further History
 •
Differential Diagnosis Algorithm ... hemolytic anemia (TTP, HUS ... Recent travel/Fevers ... Differential #Diagnosis #Algorithm ... #causes
Cryoglobulinemia Summary

Cryoglobulins:
 • Cryoglobulins are Igs in the serum that precipitate in vitro at temperatures below
• They can cause ... Cryoglobulins Cause ... infection, HBV ... • Low serum C4 complement ... diagnosis #types #classification