13 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
Atypical HUS - Hemolytic Uremic Syndrome
Unlike typical HUS, which is shigatoxin mediated, aHUS is not typically
Atypical HUS - Hemolytic ... autoimmune like SLE ... It is complement ... need the ADAMTS13 level ... #aHUS #Hemolytic
Effect of Selected Diseases on Complement Levels - C3, C4
 • SLE C3 ↓ C4 ↓↓
Selected Diseases on Complement ... Levels - C3, C4 ... • SLE C3 ↓ C4 ... C3 ↓ C4 → • HUS ... #Levels #C3 #C4
Causes of Extravascular and Intravascular Hemolysis - Differential Diagnosis Algorithm
Extravascular - Spleen and RES-mediated hemolysis
 -
Intravascular Hemolysis ... Differential Diagnosis Algorithm ... perfringens - Complement-Mediated ... MAHA (TTP, DIC, HUS ... Differential #Diagnosis #Algorithm
Pulmonary Renal Syndromes and Mimics - Differential Diagnosis Framework
Diffuse alveolar hemorrhage + rapidly progressive glomerulonephritis
90%:
 -
anti-GBM) 10%: - Low Complement ... Levels: SLE, Cryoglobulinemic ... Levels: Scleroderma ... hypertension - MAHA: HUS ... , atypical HUS,
Hemolytic Anemia - Differential Diagnosis Algorithm
Hereditary:
 • Peripheral blood smear + DAT + further History
 •
Hemolytic Anemia ... Differential Diagnosis Algorithm ... anemia (TTP, HUS ... Recent travel/Fevers ... Differential #Diagnosis #Algorithm
SLICC SLE Diagnostic Criteria - Systemic Lupus Erythematosus
Clinical and Immunologic Criteria

CLINICAL CRITERIA
 - ACUTE CUTANEOUS LUPUS
SLICC SLE Diagnostic ... NEUROLOGIC - HEMOLYTIC ... CRITERIA - ANA level ... anticoagulant - Low complement ... #Rheumatology #SLE
Hemolytic Anemia - Differential Diagnosis Algorithm
 • Sickle cells - Consider sickle cell disease (diverse genotypes):
Hemolytic Anemia ... Differential Diagnosis Algorithm ... genotypes): SS, SC, SE ... DIC, TTP, HELLP, HUS ... Differential #Diagnosis #Algorithm
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