18 results
Causes of Hypocomplementemia - CHAMPS Mnemonic
C - Cryoglobulinemia (85%), C3 glomerulopathy, cirrhosis
H - Heavy Chain deposition
Causes of Hypocomplementemia ... @AnnKumfer #Hypocomplementemia ... #Low #Complement ... #differential #hematology
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 ... Pathophysiology #Rheumatology
Rapidly Progressive Glomerulonephritis (RPGN)
RPGN has three primary pathophysiologic causes differentiated by immunofluorescence

Immune Complex Mediated (granular staining):
staining): • Low ... Complement: Post-strep ... Idiopathic • Normal Complement ... differential #diagnosis #algorithm ... #rheumatology
Vasculitis and Vasculitides - Differential Diagnosis Framework

When to Consider Vasculitis:
 • Purpura, ischemic skin lesions
 •
often involved • Hypocomplementemic ... Urticaria and hypocomplementemia ... Vasculitis: • Fevers ... against MPO • Complement ... (Low levels mixed
EULAR/ACR Classification Criteria for Systemic Lupus Erythematosus
Clinical Domains:
 • Constitutional domain: Fever
 • Cutaneous domain: Non-scarring
Constitutional domain: Fever ... pericarditis • Hematologic ... anticoagulant • Complement ... C3 or low C4, Low ... C3 and low C4
Pulmonary Renal Syndromes and Mimics - Differential Diagnosis Framework
Diffuse alveolar hemorrhage + rapidly progressive glomerulonephritis
90%:
 -
Vasculitis - Anti-GBM ... Positive (ANCA + anti-GBM ... ) 10%: - Low Complement ... Vasculitis - Normal Complement ... other hemorrhagic fevers
Complement Deficiency Testing Algorithm
 • Normal CH50 and AH50 AND High suspicion for complement deficiency
 •
Complement Deficiency ... Testing Algorithm ... deficiency • Low ... Deficiency #Testing #Algorithm ... #hematology #diagnosis
Comparison of Fever Algorithms for Infants <3 months old

AGE, INCLUSION, TESTS 
REQUIRED, "LOW RISK" CRITERIA, TREATMENT,
Comparison of Fever ... Algorithms for ... TESTS REQUIRED, "LOW ... criteria #EBM ... #Fever #Algorithm
Anemia Diagnostic Algorithm

Mean corpuscular (cell) volume (MCV): Average RBC size. Under 80 = microcytic. Between 80-95
Anemia Diagnostic Algorithm ... Low in bone marrow ... substrate (e.g. iron), low ... Algorithm by Dr. ... Diagnosis #Workup #Hematology
Vasculitis - Differential Diagnosis Framework

When to Consider Vasculitis:
• Purpura, ischemic skin lesions
• Mononeuritis multiplex
• Hematuria, proteinuria,
Vasculitis: • Fevers ... and branches • Fever ... pain and GN Anti-GBM ... Elevated AST ALT • Hypocomplementemia ... Vasculitis) • Hypocomplementemic