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

Immune Complex Mediated (granular staining):
Rapidly Progressive ... staining): • Low ... Complement: Post-strep ... GN, Lupus Nephritis ... differential #diagnosis #algorithm
Pulmonary Renal Syndromes and Mimics - Differential Diagnosis Framework
Diffuse alveolar hemorrhage + rapidly progressive glomerulonephritis
90%:
 -
Diagnosis Framework Diffuse ... hemorrhage + rapidly progressive ... anti-GBM) 10%: - Low ... Complement Levels ... Vasculitis - Normal Complement
Myositis and Myopathies
Polymyositis 
 • Progressive, symmetric muscle weakness 
 • Elevated CK, +Anti-Jo, +Anti-Mi2
Dermatomyositis
Polymyositis • Progressive ... Dermatomyositis • Progressive ... Body Myositis • Slow ... Myopathy • Diffuse ... uncommon 5-15% of lupus
Complement Deficiency Testing Algorithm
 • Normal CH50 and AH50 AND High suspicion for complement deficiency
 •
Complement Deficiency ... Testing Algorithm ... deficiency • Low ... #Deficiency #Testing ... #Algorithm #hematology
Lymphomas and Lymphoproliferative Disorders - Differential Diagnosis Algorithm
Hodgkin Lymphoma ~40% - Characteristic For Reed-Sternberg (RS) Cells
Differential Diagnosis Algorithm ... system (node) with progression ... lymphadenopathy more diffuse ... B-Cell ~90% • Low ... #differential #algorithm
SLE (Systemic Lupus Erythematosus)

Suspect:
Clinical evidence of (fatigue, rash, photosensitivity, inflammatory arthritis, weight loss, and fever) and
anti-Smith Ab, low ... complements and ... pneumonitis • Diffuse ... enteropathy, and diffuse ... , lymphopenia, low
Vasculitis and Vasculitides - Differential Diagnosis Framework

When to Consider Vasculitis:
 • Purpura, ischemic skin lesions
 •
proteinuria, rapidly progressing ... inflammation Others: • Lupus ... such as systemic lupus ... against MPO • Complement ... (Low levels mixed
Rheumatology Workup - Laboratories Studies in Rheumatic Diseases

• Septic arthritis - Gram stain and culture of
joint • Systemic lupus ... - CCP antibody testing ... Screening Tests for Diffuse ... Additional Tests for Diffuse ... chest wall, and low
Dysphagia - Differential Diagnosis Framework

Symptom | Diagnosis
• Solid-food dysphagia present for months to years | Mechanical
Schatzki ring) • Progressively ... Intermittent: Diffuse ... region • Bolus slow ... Oropharyngeal Dysphagia: Testing ... Esophageal Dysphagia: Testing