12 results
Causes of Petechial Rash - Differential Diagnosis Algorithm

Pinpoint areas (less than 2 mm) of hemorrhage, which
- Trauma - Infection ... : - Purpura fulminans ... RA, Sjogren's, GPA ... cryoglobulins • Skin ... #Petechiae #Rash
Herpes Zoster: Herpes virus mediated infection that occurred in this patient receiving chemotherapy 
for an underlying
Herpes Zoster: Herpes ... superimposed bacterial skin ... infection, most ... Images #Clinical #Photo ... #Zoster #V1 #UCSDH
Dermatologic Manifestations of Granulomatosis with Polyangiitis (GPA)

Skin involvement in granulomatosis with polyangiitis (GPA) is common and
Findings: • Petechiae ... Maculopapular rash ... cell arteritis Infections ... #dermatology #rash ... #diagnosis #rheumatology
Algorithm for Diagnosis of the Vesiculobullous Rash

Febrile, Diffuse Distribution:
 - Varicella,  Smallpox,  Disseminated, Gonococcal,
Disseminated, Gonococcal, Infection ... , Purpura Fulminans ... Contact Dermatitis, Herpes ... Zoster, Dyshidrotic ... #Dermatology #Skin
Skin Conditions Associated with Joint Pain

Rash
	• Human parvovirus B19 infection

Malar rash
	• SLE
	• Human parvovirus B19 infection
	•
Joint Pain Rash ... parvovirus B19 infection ... Malar rash ... Sarcoidosis • GPA ... differential #diagnosis #rheumatology
Vasculitis Involving the Skin - Differential Diagnosis Framework

Primary: 50% Cutaneous Vasculitis: Leukocytoclastic Vasculitis
Secondary: CTD: SLE, RA
related vasculitis, infections ... Small Vessel: Petechiae ... , Palpable purpura ... - GPA Cutaneous ... #dermatology #rheumatology
Acute Purpura Fulminans Skin Rash on Physical Exam 
60 year old male ITP s/p splenectomy 
1d
Skin Rash on Physical ... A key here is what ... - BIDMC Infectious ... #Fulminans #Skin ... #photo
Vasculitis and Vasculitides - Differential Diagnosis Framework

When to Consider Vasculitis:
 • Purpura, ischemic skin lesions
 •
> PR3 60% • GPA ... mucositis - Rash ... to exclude are infections ... • ANCA (Dx: GPA ... differential #diagnosis #rheumatology
Pustular Skin Lesions - Differential Diagnosis Framework

What are pustules?
• Pustules < 5-10 mm + pus
• Material
fungal, or viral infection ... Dermatophyte infection ... Herpes zoster 3 ... Herpes simplex ... Generalized itchy rash
Vasculitis - Differential Diagnosis Framework

When to Consider Vasculitis:
• Purpura, ischemic skin lesions
• Mononeuritis multiplex
• Hematuria, proteinuria,
to exclude are infections ... muscle weakness • Nerves ... , mucositis • Rash ... MPO > PR3 60/ GPA ... Differential #Diagnosis #Rheumatology