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Skin Conditions Associated with Joint Pain

Rash
	• Human parvovirus B19 infection

Malar rash
	• SLE
	• Human parvovirus B19 infection
	•
Malar rash • SLE ... Dermatomyositis Erythema chronicum ... • Rheumatic fever ... IBD • RA • SLE ... lesions • Discoid lupus
EULAR/ACR Classification Criteria for Systemic Lupus Erythematosus
Clinical Domains:
 • Constitutional domain: Fever
 • Cutaneous domain: Non-scarring
Constitutional domain: Fever ... , Acute cutaneous ... lupus • Arthritis ... pericardial effusion, Acute ... Classification #Criteria #SLE
SLE (Systemic Lupus Erythematosus)

Suspect:
Clinical evidence of (fatigue, rash, photosensitivity, inflammatory arthritis, weight loss, and fever) and
SLE (Systemic Lupus ... weight loss, and fever ... Classification: • Acute ... , Fever, Serositis ... : • Chronic B-cell
Causes of Diffuse Lymphadenopathy - Differential Diagnosis Algorithm
Reactive:
 - Systemic Inflammatory
     •
• Systemic Lupus ... • Rheumatoid Arthritis ... Fatigue • Acute ... Age > 50 • Chronic ... #Causes #Hematology
Approach to Joint Pain - Arthritis Differential Diagnosis Framework

Inflammatory Versus Noninflammatory Pain
 • Is it inflammatory
• Rheumatic fever ... streptococci (rheumatic fever ... • SLE • Psoriatic ... Symmetrical: • RA • SLE ... Diagnosis #MSK #rheumatology
Approach to Joint Pain - Diagnostic Framework

1) Chronicity
2) Inflammatory vs Non-Inflammatory
3) Number of Joints Involved

1) Chronicity:
rheumatic fever ... • Chronic - Think ... spondyloarthropathies, lupus ... hepatitis, herpes • Chronic ... = RA, SLE, psoriatic
Sarcoidosis - Diagnosis and Management Summary
Epidemiology
1) High incidence in Scandinavian countries (11-24 cases per 100,000 individuals
hypervitaminosis D) hyperphosphatemia ... General: fever, ... Extrapulmonary: ankle arthritis ... skin (16-32%): lupus ... , fever, migratory
Rheumatology Workup - Laboratories Studies in Rheumatic Diseases

• Septic arthritis - Gram stain and culture of
Rheumatology Workup ... joint • Systemic lupus ... Screening Tests for Acute ... Screening Tests for Chronic ... diagnosis #testing #Rheumatology
Vasculitis and Vasculitides - Differential Diagnosis Framework

When to Consider Vasculitis:
 • Purpura, ischemic skin lesions
 •
Eosinophilia, asthma, chronic ... Coronary arteries - Fever ... such as systemic lupus ... Vasculitis: • Fevers ... vasculitis, and SLE