10 results
Rapidly Progressive Glomerulonephritis (RPGN)
RPGN has three primary pathophysiologic causes differentiated by immunofluorescence

Immune Complex Mediated (granular staining):
Normal Complement: IgA ... nephropathy, Henoch-SchonIein ... Purpura Anti-GBM ... Glomerulonephritis #Vasculitis #differential ... diagnosis #algorithm #rheumatology
Causes of Petechial Rash - Differential Diagnosis Algorithm

Pinpoint areas (less than 2 mm) of hemorrhage, which
Rash - Differential ... Schonlein Purpura ... RA, Sjogren's, GPA ... cryoglobulins • Skin ... #Petechiae #Rash
Henoch Schonlein Leg Rash - Palpable Purpura
Purpura: Low Platelets or Vasculitis?
45 years old, seen in our
Henoch Schonlein ... Tip: To differentiate ... suggestive of Henoch-Schonlein ... purpura (IgA), ... #Schonlein #Purpura
Palpable Purpura seen in Henoch Schonlein Purpura (HSP, IgA Vasculitis)

55 year old male on tuberculosis treatment
seen in Henoch ... Schonlein Purpura ... #Henoch #Schonlein ... #clinical #photo ... #dermatology #skin
Dermatologic Manifestations of Granulomatosis with Polyangiitis (GPA)

Skin involvement in granulomatosis with polyangiitis (GPA) is common and
Findings: • Petechiae ... Maculopapular rash ... reticularis Differential ... • Henoch-Schönlein ... #diagnosis #rheumatology
Skin Conditions Associated with Joint Pain

Rash
	• Human parvovirus B19 infection

Malar rash
	• SLE
	• Human parvovirus B19 infection
	•
vasculitis • Henoch ... Schönlein purpura ... Sarcoidosis • GPA ... #rashes #differential ... #diagnosis #rheumatology
Vasculitis Involving the Skin - Differential Diagnosis Framework

Primary: 50% Cutaneous Vasculitis: Leukocytoclastic Vasculitis
Secondary: CTD: SLE, RA
- Differential ... Small Vessel: Petechiae ... , Palpable purpura ... #dermatology #rheumatology ... #differential #
Cryoglobulinemia Summary

Cryoglobulins:
 • Cryoglobulins are Igs in the serum that precipitate in vitro at temperatures below
- Skin ulcers ... reticularis & skin ... associated vasculitis - GPA ... (Henoch-Schönlein ... classification #rheumatology
Vasculitis and Vasculitides - Differential Diagnosis Framework

When to Consider Vasculitis:
 • Purpura, ischemic skin lesions
 •
often present • Henoch ... Schonlein Purpura ... (IgA vasculitis ... mucositis - Rash ... #diagnosis #rheumatology
Vasculitis - Differential Diagnosis Framework

When to Consider Vasculitis:
• Purpura, ischemic skin lesions
• Mononeuritis multiplex
• Hematuria, proteinuria,
, mucositis • Rash ... MPO > PR3 60/ GPA ... often present) Henoch ... Schonlein Purpura ... #Diagnosis #Rheumatology