6 results
Skin Conditions Associated with Joint Pain

Rash
	• Human parvovirus B19 infection

Malar rash
	• SLE
	• Human parvovirus B19 infection
	•
Vesicopustule on erythematous ... Hypersensitivity vasculitis ... Antiphospholipid-antibody syndrome • Vasculitis ... Discoid lupus erythematosus ... #differential #diagnosis
Vasculitis and Vasculitides - Differential Diagnosis Framework

When to Consider Vasculitis:
 • Purpura, ischemic skin lesions
 •
- Differential Diagnosis ... ischemia - Skin: erythematous ... Differential Diagnosis ... systemic lupus erythematosus ... Lab Tests: • CBC
SLE (Systemic Lupus Erythematosus)

Suspect:
Clinical evidence of (fatigue, rash, photosensitivity, inflammatory arthritis, weight loss, and fever) and
Differential Diagnosis ... ANCA-associated vasculitis ... • Mesenteric vasculitis ... titers > 1:80 • CBC ... #Diagnosis #Rheumatology
Pulmonary Renal Syndrome

Definition: Diffuse alveolar hemorrhage + Glomerulonephritis
Presentation (Pulmonary and renal manifestations can occur weeks apart):
Differential Diagnosis ... ANCA-positive vasculitis ... Systemic lupus erythematosus ... Investigations • Labs: CBC ... #differential #diagnosis
Differential Diagnosis of Acute Arthritis

Crystal-induced arthritis: Calcium oxalate, gout, cholesterol, pseudogout, hydroxyapatite crystals

Infectious arthritis: Bacteria, fungi,
Differential Diagnosis ... systemic lupus erythematosus ... arthritis), systemic vasculitis ... endocarditis, human ... villonodular synovitis #Diagnosis
Erythema Nodosum Overview

Definition: 
 • EN is an inflammatory condition characterized by tender, red nodules, typically
onset of painful, erythematous ... Diagnostic Approach ... Complete blood count (CBC ... panniculitis without vasculitis ... Erythema #Nodosum #Diagnosis