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Algorithm for workup of thrombocytopenia based on observation of the peripheral blood film. 
TTP/HUS indicates thrombotic
for workup of thrombocytopenia ... the peripheral blood ... hemolytic uremic syndrome ... , Hematology 2012 ... , p 193 #Diagnosis
Clinical Features of Systemic Lupus (SLE)
General: Fever (50%), Depression, Fatigue (75%), Weight loss (50%)
Eye: Sjögrens (15%)
Skin
Sjögrens (15%) Skin ... Demyelinating syndromes ... Glomerulonephritis Myositis(5%) Blood ... signs #symptoms #diagnosis ... #rheumatology
VEXAS (Vacuoles, E1 enzyme, X-linked, Autoinflammatory, Somatic) Syndrome
Clinical Syndrome:
 • Common Clinical Features: alveolitis, ear and
nose chondritis, skin ... vasculitis • Hematologic ... macrocytic anemia, thrombocytopenia ... including peripheral blood ... Autoinflammatory #Somatic #rheumatology
Skin Conditions Associated with Joint Pain

Rash
	• Human parvovirus B19 infection

Malar rash
	• SLE
	• Human parvovirus B19 infection
	•
Skin Conditions ... Antiphospholipid-antibody syndrome ... lesions • Discoid lupus ... #differential #diagnosis ... #rheumatology
Systemic Lupus Erythematosus - Summary
Antinuclear (ANA) - 95% - Initial screening test
Anti-dsDNA - 50%
 • Associated
Systemic Lupus Erythematosus ... Associated with skin ... #SLE #Summary #diagnosis ... #rheumatology # ... management
CNS Manifestations of Systemic Lupus Erythematosus (SLE)

Clinical Manifestations: Demyelinating Syndrome, Headache, Movement disorders, Seizure disorders, Aseptic
Demyelinating Syndrome ... thrombosis and/or blood-brain ... permeability Diagnosis ... CNS #neurology #rheumatology ... #management #treatment
Purpura - Differential Diagnosis Framework

Non-blanchable, dark red to purple, hemorrhagic skin lesions that result from leakage
- Differential Diagnosis ... purple, hemorrhagic skin ... Kasabach-Merritt syndrome ... Gardner-Diamond syndrome ... #hematology #rheumatology
Macrophage Activation Syndrome (MAS)
Classified among the secondary or acquired forms of haemophagocytic lymphohistiocytosis (sHLH)

What?
A subset of
disease • Systemic lupus ... SJIA], systemic lupus ... leukopenia, anemia, and thrombocytopenia ... #Diagnosis #Management ... #Hematology #Rheumatology
Heparin Induced Thrombocytopenia (HIT) - Diagnosis and Management - GrepMed Handbook

Presentation: 
 • Plts ↓50% (nadir
and Management ... arterial thrombosis, skin ... exposure (prevent skin ... #Diagnosis #Management ... #Treatment #Hematology
Diagnostic Framework for Hemolysis - Intravascular vs Extravascular Causes
Intravascular Hemolysis:
 • Mechanical Trauma (Microangiopathic hemolytic anemia):
Diagnostic Framework ... ) - HELLP syndrome ... microangiopathy: Thrombotic thrombocytopenic ... usually IgG) (e.g. lupus ... #hematology #anemia