213 results
Petechial/Purpuric Rashes- THE ALGORITHMIC APPROACH 

These rashes can be especially challenging and are
associated with devastating differential
palpable versus nonpalpable ... purpura occurs in vasculitic ... Nonpalpable purpura ... lesions may have a vasculitis ... as autoimmune vasculitis
Causes of Purpura - Differential Diagnosis
Disruption in Vascular Integrity: 
 • Trauma, Infection, Vasculitis, Drug induced
Trauma, Infection, Vasculitis ... , Drug induced vasculitis ... BrighamChiefs #Purpura #nonpalpable ... Differential #Diagnosis #vasculitis
Causes of Purpura - Differential Diagnosis
Non-PalpabIe → Palpable
 • Thrombocytopenia (HIT, ITP/HUS), Coagulation defects (DIC, warfarin
Leukocytoclastic Vasculitis ... BrighamChiefs #Purpura #nonpalpable ... Differential #Diagnosis #vasculitis
Purpura - Differential Diagnosis Framework

Non-blanchable, dark red to purple, hemorrhagic skin lesions that result from leakage
PALPABLE PURPURA: Vasculitis ... Leukocytoclastic vasculitis ... • Ig A vasculitis ... HCV, HBV Not Vasculitis ... rheumatology #palpable #nonpalpable
Bleeding manifestations 
Petechiae are small, flat, red, discrete areas of skin bleeding that are typically <2
non-blanching, nonpalpable ... Purpura due to vasculitis
Small Vessel Vasculitides
 • Granulomatosis with polyangiitis - Granulomatous manifestations (e.g., nasal crusting, destructive sinusitis, pulmonary
Small Vessel Vasculitides ... Cryoglobulinemic vasculitis ... syndrome • IgA vasculitis ... Small #Vessel #Vasculitides ... #vasculitis #differential
A System for Vasculitides 

#Diagnosis #IM #Rheum #Vasculitis #Small #Medium #Large #Vessel #Size #Classification #ANCA #Differential
A System for Vasculitides ... Diagnosis #IM #Rheum #Vasculitis
Vasculitis - Break down based on vessel size 
Distribution of vessel involvement by large vessel vasculitis,
Vasculitis - Break ... by large vessel vasculitis ... medium vessel vasculitis ... and small vessel vasculitis ... Large vessel vasculitis
Vasculitis: In this instance, the vasculitic skin lesions were secondary to Haemophilus endocarditis.
Photo credit, Josh Fierer,
Vasculitis: In this ... instance, the vasculitic ... Dermatology #SkinRash #Vasculitis
Vasculitis and Vasculitides - Differential Diagnosis Framework

When to Consider Vasculitis:
 • Purpura, ischemic skin lesions
 •
Vasculitis and Vasculitides ... When to Consider Vasculitis ... SMALL VESSEL VASCULITIS ... (anti-C1q Vasculitis ... #Vasculitides #