42 results
Purpura - Differential Diagnosis Framework

Non-blanchable, dark red to purple, hemorrhagic skin lesions that result from leakage
Splenomegaly - CTD (SLE ... Kasabach-Merritt syndrome ... Associated - SLE ... Differential #Diagnosis #hematology ... #rheumatology #
Systemic Lupus Erythematosus - Summary
Antinuclear (ANA) - 95% - Initial screening test
Anti-dsDNA - 50%
 • Associated
severe disease & renal ... block • Sjogren syndrome ... polymyositis overlap syndrome ... • Specific for SLE ... Summary #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 ... Antiphospholipid-antibody syndrome ... Sarcoidosis #dermatology ... differential #diagnosis #rheumatology
Causes of Thrombocytopenia - Differential Diagnosis Algorithm
 
Decreased Megakaryopoiesis
 • Aplastic Anemia
 • Toxic Damage (e.g.
Autoimmune • ITP • SLE ... Non-lmmune: • HELLP Syndrome ... Algorithm #Causes #Hematology
Facial Swelling - Differential Diagnosis Framework for Facial Edema

Infectious:
	• Dental abscess
	• Ludwig's angina
	• Vincent's angina
	• Cellulitis
	•
Infectious: • Dental ... Autoimmune: • SLE ... • Sjogren's syndrome ... Preeclampsia Dermatologic ... • Nephrotic syndrome
Hydroxychloroquine Serum Measurement in SLE
 • Terminal elimination half-life = 40 days ([HCQI reflects long-term intake)
Measurement in SLE ... Special cases (e.g. renal ... #Measurement #SLE ... #rheumatology # ... pharmacology #levels
Differential diagnosis of schistocytes / fragmentation hemolysis:
 • Thrombotic microangiopathies (TMA)
    - TTP
hemolytic-uremic syndrome ... • Scleroderma renal ... anemia" • HELLP syndrome ... differential #diagnosis #hematology
Causes of Thrombocytopenia - Differential Diagnosis Framework
Decreased Production:
 - Drugs (chemo, yang, sulfa, acetaminophen, NSAIDs, quinine,
- Autoimmune: SLE ... antiphospholipid syndrome ... Diagnosis #Framework #hematology
Behçet's Syndrome
Systemic disease associated with inflammation of multiple organs, small-vessel vasculitis and large-vessel vasculopathy
Epidemiology:
 • Young
Behçet's Syndrome ... tests in Behcet syndrome ... Oral aphthae : SLE ... • Arthritis: SLE ... signs #symptoms #rheumatology
Vasculitis Involving the Skin - Differential Diagnosis Framework

Primary: 50% Cutaneous Vasculitis: Leukocytoclastic Vasculitis
Secondary: CTD: SLE, RA
Secondary: CTD: SLE ... Disease • Cogan syndrome ... Vasculitis #skin #dermatology ... #rheumatology #