20 results
Drug Induced Lupus vs SLE
Drug Induced Lupus (DIL):
 • Epidemiology: -10% of all lupus cases, drug-dependent,
cases, drug-dependent ... & NPSLE rare, Malar ... Discontinuation of causal ... Manifestations: Malar ... comparison #table #rheumatology
Systemic Lupus Erythematosus (SLE) - Diagnosis and Management Summary
 • Epidemiology: 10-180/100,000, Typically Age 20-40, F:M
Systemic Lupus Erythematosus ... Manifestations: Malar ... of SLE versus DIL ... Positive in 60-80% of cases ... Management #Summary #rheumatology
Cryoglobulinemia Summary

Cryoglobulins:
 • Cryoglobulins are Igs in the serum that precipitate in vitro at temperatures below
causing endothelial injury ... • They can cause ... Cryoglobulins Cause ... (e.g. systemic lupus ... classification #rheumatology
Causes of Hypocomplementemia - CHAMPS Mnemonic
C - Cryoglobulinemia (85%), C3 glomerulopathy, cirrhosis
H - Heavy Chain deposition
Causes of Hypocomplementemia ... Mnemonic C - Cryoglobulinemia ... S - Systemic Lupus ... #differential #hematology
Rapidly Progressive Glomerulonephritis (RPGN)
RPGN has three primary pathophysiologic causes differentiated by immunofluorescence

Immune Complex Mediated (granular staining):
pathophysiologic causes ... Post-strep GN, Lupus ... Nephritis, Cryoglobulinemia ... diagnosis #algorithm #rheumatology
Diagnostic Framework for Hemolysis - Intravascular vs Extravascular Causes
Intravascular Hemolysis:
 • Mechanical Trauma (Microangiopathic hemolytic anemia):
Extravascular Causes ... intravascular coagulation (DIC ... usually IgG) (e.g. lupus ... • Infections: Malaria ... Extravascular #Causes
Differential Diagnosis for Hemolytic Anemia
Intrinsic Causes:
 • Enzyme deficiencies ex. G6PD, pyruvate kinase 
 • Hemoglobinopathies
Anemia Intrinsic Causes ... Bartonella, Babesia, Malaria ... Intravascular Causes ... MAHA: TTP, HUS, DIC ... classification #hematology
Purpura - Differential Diagnosis Framework

Non-blanchable, dark red to purple, hemorrhagic skin lesions that result from leakage
• Secondary Causes ... marrow disease - DIC ... vasculitis/HSP • Cryoglobulinemia ... Differential #Diagnosis #hematology ... #rheumatology #
Causes of Extravascular and Intravascular Hemolysis - Differential Diagnosis Algorithm
Extravascular - Spleen and RES-mediated hemolysis
 -
Causes of Extravascular ... Infections • Malaria ... • MAHA (TTP, DIC ... Diagnosis #Algorithm #Causes ... #Hematology
Causes of Thrombocytopenia - Differential Diagnosis Framework
Decreased Production:
 - Drugs (chemo, yang, sulfa, acetaminophen, NSAIDs, quinine,
Causes of Thrombocytopenia ... - Parasitic: Malaria ... Microangiopathy: DIC ... Diagnosis #Framework #hematology