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

Immune Complex Mediated (granular staining):
Negative IF): • PR3-ANCA ... (C-ANCA): GPA > ... MPO-ANCA (P-ANCA ... #differential # ... #rheumatology
Cryoglobulinemia Summary

Cryoglobulins:
 • Cryoglobulins are Igs in the serum that precipitate in vitro at temperatures below
Hyperviscosity Syndrome ... syndrome in 80% ... DDX: • ANCA (Antineutrophil ... - GPA, EGPA, microscopic ... classification #rheumatology
Vasculitis and Vasculitides - Differential Diagnosis Framework

When to Consider Vasculitis:
 • Purpura, ischemic skin lesions
 •
Vasculitis: + MPO-ANCA ... mucositis - Rash ... (Dx: GPA, EGPA, ... Serologies for Cryoglobulins ... #rheumatology #
Vasculitis Involving the Skin - Differential Diagnosis Framework

Primary: 50% Cutaneous Vasculitis: Leukocytoclastic Vasculitis
Secondary: CTD: SLE, RA
ANCA Associated: ... - Microscopic ... - GPA Cutaneous ... Disease • Cogan syndrome ... #rheumatology #
ANCA-Associated Vasculitis
There are many definitions, but most come down to the presence of granulomas (pathologically or
ANCA-Associated ... polyangiitis (GPA ... StanfordChiefs #ANCA ... #Vasculitis #differential ... #rheumatology
Causes of Petechial Rash - Differential Diagnosis Algorithm

Pinpoint areas (less than 2 mm) of hemorrhage, which
- Differential ... Diagnosis Algorithm ... , EGPA, Microscopic ... Measurement of antinuclear ... immunoglobulins & cryoglobulins
Purpura - Differential Diagnosis Framework

Non-blanchable, dark red to purple, hemorrhagic skin lesions that result from leakage
/HSP • Cryoglobulinemia ... (MIXED) • ANCA ... - GPA - EGPA ... #Diagnosis #hematology ... #rheumatology #
Dermatologic Manifestations of Granulomatosis with Polyangiitis (GPA)

Skin involvement in granulomatosis with polyangiitis (GPA) is common and
reticularis Differential ... purpura • Mixed cryoglobulinemia ... • Goodpasture syndrome ... #dermatology #rash ... #diagnosis #rheumatology
Vasculitis - Differential Diagnosis Framework

When to Consider Vasculitis:
• Purpura, ischemic skin lesions
• Mononeuritis multiplex
• Hematuria, proteinuria,
Vasculitis - Differential ... , mucositis • Rash ... )): Microscopic ... + MPO) Cryoglobulinemic ... Diagnosis #Rheumatology