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diagnosis rheumatology differential management sle erythematosus systemic vasculitis druginduced hematology causes champs comparison criteria cryoglobulinemia cryoglobulins dil disorders eularacr gammopathy
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
EULAR/ACR Classification Criteria for Systemic Lupus Erythematosus Clinical Domains: • Constitutional domain: Fever • Cutaneous domain: Non-scarring
EULAR/ACR Classification ... anticoagulant • Complement ... C3 or low C4, Low ... C3 and low C4 ... #EULARACR #Classification
Rapidly Progressive Glomerulonephritis (RPGN) RPGN has three primary pathophysiologic causes differentiated by immunofluorescence Immune Complex Mediated (granular staining):
staining): • Low ... Complement: Post-strep ... GN, Lupus Nephritis ... Idiopathic • Normal Complement ... differential #diagnosis #algorithm
Management of Lupus Nephritis Lupus nephritis (LN) in 10 to 40% of SLE Hallmark = proteinuria 20.5 g/g
severity (ISN/RPS classification ... by 12 months Classification ... • Class IV - Diffuse ... glomeruli) Diffuse ... Nephritis #Management #treatment
Drug Induced Lupus vs SLE Drug Induced Lupus (DIL): • Epidemiology: -10% of all lupus cases, drug-dependent,
in >90% - Low ... complement - Rare ... 60-80% - Low ... complement - 50 ... life-threatening • Treatment
Systemic Lupus Erythematosus (SLE) - Diagnosis and Management Summary • Epidemiology: 10-180/100,000, Typically Age 20-40, F:M
Systemic Lupus Erythematosus ... , oral ulcers, Lupus ... 60-80% - Low ... complement - 50 ... life-threatening • Treatment
Lymphomas and Lymphoproliferative Disorders - Differential Diagnosis Algorithm Hodgkin Lymphoma ~40% - Characteristic For Reed-Sternberg (RS) Cells
Differential Diagnosis Algorithm ... lymphadenopathy more diffuse ... B-Cell ~90% • Low ... Responsive to Treatment ... Lymphoproliferative #Disorders #Classification
SLE (Systemic Lupus Erythematosus) Suspect: Clinical evidence of (fatigue, rash, photosensitivity, inflammatory arthritis, weight loss, and fever) and
anti-Smith Ab, low ... complements and ... Skin Disease Classification ... pneumonitis • Diffuse ... , lymphopenia, low
Vasculitis and Vasculitides - Differential Diagnosis Framework When to Consider Vasculitis: • Purpura, ischemic skin lesions •
inflammation Others: • Lupus ... such as systemic lupus ... against MPO • Complement ... (Low levels mixed ... #rheumatology #classification
Cryoglobulinemia Summary Cryoglobulins: • Cryoglobulins are Igs in the serum that precipitate in vitro at temperatures below
factor level • Low ... serum C4 complement ... (e.g. systemic lupus ... diagnosis #types #classification
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