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Thrombotic Microangiopathies In Systemic Lupus Erythematosus

Dr. Laurent ARNAUD @Lupusreference

#TMAs #Thrombotic #Microangiopathies #Systemic #Lupus #Erythematosus #SLE #hematology
Erythematosus #SLE ... #hematology #rheumatology ... #differential # ... diagnosis #causes
I’M DAMN SHARP - Lupus Diagnosis Mnemonic
I  	 Immunoglobulins (Anti-dsDNA, Anti-Sm, Anti-phospholipid)
M 	 Malar Rash
D
SHARP - Lupus Diagnosis ... Discoid Rash A Antinuclear ... #IMDAMNSHARP #sle ... erythematosus #rheumatology ... #diagnosis #mnemonic
ANA Patterns and Associated Rheumatic Diseases:
 • Homogeneous: Systemic lupus erythematosus (SLE), Mixed connective tissue disease
erythematosus (SLE ... erythematosus (SLE ... Kumfer @AnnKumfer #Antinuclear ... ANA #patterns #rheumatology ... #diagnosis #differential
Systemic Lupus Erythematosus - Summary
Antinuclear (ANA) - 95% - Initial screening test
Anti-dsDNA - 50%
 • Associated
Erythematosus - Summary Antinuclear ... • Specific for SLE ... #Summary #diagnosis ... #rheumatology # ... management
Antinuclear antibodies and Systemic lupus
Anti-dsDNA	60-80%	Association with disease activity (when with Farr assay) and lupus nephritis. Can
Antinuclear antibodies ... Highly specific for SLE ... Lupusreference #Antinuclear ... erythematosus #diagnosis ... #rheumatology #
Antinuclear Antibody Testing - Nuclear and Cytoplasmic Patterns
Nuclear Patterns:
 • Homogeneous pattern: 
   -
Antinuclear Antibody ... pattern: - SLE ... ARUPLabs #ANA #Antinuclear ... Cytoplasmic #Patterns #differential ... #diagnosis #rheumatology
ANA (Antinuclear Antibody) and ANCA (Antineutrophil cytoplasmic antibodies)
 • Systemic lupus erythematosus
   1. Anti-dsDNA
ANA (Antinuclear ... in drug-induced SLE ... Jcortesizaguirr #ANA #Antinuclear ... Antineutrophil #antibodies #diagnosis ... #rheumatology #
Skin Conditions Associated with Joint Pain

Rash
	• Human parvovirus B19 infection

Malar rash
	• SLE
	• Human parvovirus B19 infection
	•
Malar rash • SLE ... IBD • RA • SLE ... erythematosus • SLE ... #skin #rashes #differential ... #diagnosis #rheumatology
Approach to a Positive (+) Rheumatoid Factor (RF)
(+) RF does not always = RA
Rheumatic disorders:
 •
arthritis • SLE ... Rheumatoid #Factor #RF #rheumatology ... #laboratory #differential ... #diagnosis
Causes of Thrombocytopenia - Differential Diagnosis Algorithm
 
Decreased Megakaryopoiesis
 • Aplastic Anemia
 • Toxic Damage (e.g.
Thrombocytopenia - Differential ... Diagnosis Algorithm ... Autoimmune • ITP • SLE ... #Diagnosis #Algorithm ... #Causes #Hematology