13 results
Myositis and Myopathies
Polymyositis 
 • Progressive, symmetric muscle weakness 
 • Elevated CK, +Anti-Jo, +Anti-Mi2
Dermatomyositis
Rheumatica • Pain ... , Gemcitabine Lupus ... Myopathies #myopathy #differential ... #diagnosis #comparison ... #rheumatology
Rapidly Progressive Glomerulonephritis (RPGN)
RPGN has three primary pathophysiologic causes differentiated by immunofluorescence

Immune Complex Mediated (granular staining):
Post-strep GN, Lupus ... Glomerulonephritis #Vasculitis ... #differential # ... diagnosis #algorithm ... #rheumatology
Vasculitis and Vasculitides - Differential Diagnosis Framework

When to Consider Vasculitis:
 • Purpura, ischemic skin lesions
 •
(anti-C1q Vasculitis ... such as systemic lupus ... , infarct • Small ... differential #diagnosis ... #rheumatology #
Skin Conditions Associated with Joint Pain

Rash
	• Human parvovirus B19 infection

Malar rash
	• SLE
	• Human parvovirus B19 infection
	•
Associated with Joint Pain ... lesions • Discoid lupus ... dermatology #joint #pain ... #skin #rashes #differential ... #diagnosis #rheumatology
Aortitis - Differential Diagnosis Framework
Non-Infectious Aortitis:
 • Vasculitides: Giant Cell Arteritis (GCA), Takayasu's arteritis, Cogan's Syndrome,
Aortitis - Differential ... Diagnosis Framework ... Polyarteritis Nodosa (PAN ... (RA), Systemic lupus ... #Diagnosis #rheumatology
SLE (Systemic Lupus Erythematosus)

Suspect:
Clinical evidence of (fatigue, rash, photosensitivity, inflammatory arthritis, weight loss, and fever) and
permanent alopecia Differential ... Diagnosis: • ANCA-associated ... Non-autoimmune rheumatologic ... Arthritis: • Joint pain ... #Rheumatology
Causes of Bone/Joint Pain in Sickle Cell Disease
Vaso-occlusive pain:
 • Mechanism: ischemic pain
 • Can present
Can present from infancy ... predispose to other orthopedic ... • Differentiate ... #diagnosis #causes ... #hematology
Causes of Petechial Rash - Differential Diagnosis Algorithm

Pinpoint areas (less than 2 mm) of hemorrhage, which
Petechial Rash - Differential ... Diagnosis Algorithm ... lesions • Severe pain ... (lupus, RA, Sjogren's ... electrophoresis, anti-streptolysin
Vasculitis - Differential Diagnosis Framework

When to Consider Vasculitis:
• Purpura, ischemic skin lesions
• Mononeuritis multiplex
• Hematuria, proteinuria,
Vasculitis - Differential ... Differential Diagnosis ... (anti-C1q Vasculitis ... (anti-C1q Vasculitis ... Diagnosis #Rheumatology
Antinuclear Antibodies (ANA)
ANA or Anti-NucIear Antibody refers to antibodies against antigens in the nucleus → like
Antibodies (ANA) ANA or Anti-NucIear ... assay (IFA) is the main ... , Drug-induced Lupus ... ANA #patterns #rheumatology ... #diagnosis #differential