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Thrombotic Microangiopathies In Systemic Lupus Erythematosus

Dr. Laurent ARNAUD @Lupusreference

#TMAs #Thrombotic #Microangiopathies #Systemic #Lupus #Erythematosus #SLE #hematology
Microangiopathies In Systemic Lupus ... Erythematosus #SLE ... #hematology #rheumatology ... #differential # ... diagnosis #causes
Causes of Hypocomplementemia - CHAMPS Mnemonic
C - Cryoglobulinemia (85%), C3 glomerulopathy, cirrhosis
H - Heavy Chain deposition
Causes of Hypocomplementemia ... 1 (50%-80%), type ... S - Systemic Lupus ... Mnemonic #diagnosis #differential ... #hematology
Cryoglobulinemia Summary

Cryoglobulins:
 • Cryoglobulins are Igs in the serum that precipitate in vitro at temperatures below
• They can cause ... Cryoglobulins Cause ... (e.g. systemic lupus ... #classification ... #rheumatology #
Causes of Lactate Elevation, Lactic Acidosis - Differential Diagnosis

The most common causes of hyperlactatemia are usually:
- Differential ... again we might see ... B1: - Diabetes ... #Elevation #Differential ... classification
SLE (Systemic Lupus Erythematosus)

Suspect:
Clinical evidence of (fatigue, rash, photosensitivity, inflammatory arthritis, weight loss, and fever) and
SLE (Systemic Lupus ... Skin Disease Classification ... permanent alopecia Differential ... Non-autoimmune rheumatologic ... Kikuchi disease • Type-I
Hyperkalemia - Differential Diagnosis Framework

PseudoHyperkalemia:
 • Lab error
 • Traumatic venipuncture
 • Hemolysis, thrombocytosis, leukocytosis
 •
(Uncontrolled diabetes ... - Metabolic acidosis ... insufficiency/Failure • SLE ... • Type IV RTA ... #diagnosis #causes
Hyperkalemia - Differential Diagnosis Framework

PseudoHyperkalemia:
 • Lab error
 • Traumatic venipuncture
 • Hemolysis, thrombocytosis, leukocytosis
 •
(Uncontrolled diabetes ... - Metabolic acidosis ... insufficiency/Failure • SLE ... • Type IV RTA ... #diagnosis #causes
Causes of Hyperkalemia
l. Pseudohyperkalemia
  A Cellular efflux; thrombocytosis, erythrocytosis, leukocytosis, in vitro hemolysis
  B.
Acidosis B. ... diseases: syßtemic lupus ... Diabetes, diabetic ... #Hyperkalemia #Differential ... High #Potassium #Classification
Vasculitis and Vasculitides - Differential Diagnosis Framework

When to Consider Vasculitis:
 • Purpura, ischemic skin lesions
 •
tract, and often causes ... such as systemic lupus ... vasculitis, and SLE ... #diagnosis #rheumatology ... #classification