36 results
Diagnosis and Management of Hypocomplementemic Urticarial Vasculitis (HUV)

Diagnosis of HUV
1) Chronic urticaria 
2) Leukocytoclastic vasculitis 
3)
Diagnosis and Management ... of Hypocomplementemic ... ) Diagnosis of ... vasculitis 3) Hypocomplementemia ... TerrierBen #Hypocomplementemic
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 ... CHAMPS #Mnemonic #diagnosis
Effect of Selected Diseases on Complement Levels - C3, C4
 • SLE C3 ↓ C4 ↓↓
Levels - C3, C4 ... • SLE C3 ↓ C4 ... C3 ↓ C4 → • HUS ... #Levels #C3 #C4 ... #differential #diagnosis
Pulmonary Renal Syndromes and Mimics - Differential Diagnosis Framework
Diffuse alveolar hemorrhage + rapidly progressive glomerulonephritis
90%:
 -
- Differential Diagnosis ... Levels: SLE, Cryoglobulinemic ... Levels: Scleroderma ... , atypical HUS, ... #Differential #Diagnosis
Atypical HUS - Hemolytic Uremic Syndrome
Unlike typical HUS, which is shigatoxin mediated, aHUS is not typically
autoimmune like SLE ... It is complement ... need the ADAMTS13 level ... with Eculizumab (complement ... Uremic #Syndrome #diagnosis
Vasculitis and Vasculitides - Differential Diagnosis Framework

When to Consider Vasculitis:
 • Purpura, ischemic skin lesions
 •
often involved • Hypocomplementemic ... Urticaria and hypocomplementemia ... against MPO • Complement ... (Low levels mixed ... vasculitis, and SLE
SLICC SLE Diagnostic Criteria - Systemic Lupus Erythematosus
Clinical and Immunologic Criteria

CLINICAL CRITERIA
 - ACUTE CUTANEOUS LUPUS
SLICC SLE Diagnostic ... CRITERIA - ANA level ... Anti-dsDNA antibody level ... anticoagulant - Low complement ... #Rheumatology #SLE
Causes of Extravascular and Intravascular Hemolysis - Differential Diagnosis Algorithm
Extravascular - Spleen and RES-mediated hemolysis
 -
- Differential Diagnosis ... Algorithm Extravascular ... perfringens - Complement-Mediated ... MAHA (TTP, DIC, HUS ... #Algorithm #Causes
Rapidly Progressive Glomerulonephritis (RPGN)
RPGN has three primary pathophysiologic causes differentiated by immunofluorescence

Immune Complex Mediated (granular staining):
Glomerulonephritis (RPGN) RPGN has ... staining): • Low Complement ... Idiopathic • Normal Complement ... #differential #diagnosis ... #algorithm #rheumatology