20 results
Causes of Petechial Rash - Differential Diagnosis Algorithm

Pinpoint areas (less than 2 mm) of hemorrhage, which
Rash - Differential ... Diagnosis Algorithm ... Red Flags: • Fever ... cryoglobulins • Skin ... #Petechiae #Rash
Skin Conditions Associated with Joint Pain

Rash
	• Human parvovirus B19 infection

Malar rash
	• SLE
	• Human parvovirus B19 infection
	•
Joint Pain Rash ... • Rheumatic fever ... gangrenosum • IBD ... #rashes #differential ... #diagnosis #rheumatology
SKIN RASHES 



Skin rashes can occur from a variety of factors, including infections, heat, allergens, immune
rapid and accurate diagnosis ... /purpuric, erythematous ... the presence of fever ... and systemic signs ... ; #purpura; #rash
Erythematous Rashes - THE ALGORITHMIC APPROACH

Characterized by diffuse redness of the skin due to
capillary congestion, erythematous
redness of the skin ... , the differential ... rash but without ... Rash #Algorithm ... #Differential
Scarlet fever
• Delayed-type skin reactivity to pyrogenic exotoxin Requires prior exposure
• Diffuse erythematous eruption that generally
Delayed-type skin ... exposure • Diffuse erythematous ... Pastia lines = petechial ... #diagnosis #clinical ... #photo #signs #
Dermatologic Manifestations of Granulomatosis with Polyangiitis (GPA)

Skin involvement in granulomatosis with polyangiitis (GPA) is common and
Findings: • Petechiae ... Maculopapular rash ... reticularis Differential ... Diagnosis: Vasculitis ... #dermatology #rash
Combination of Skin Findings and Arthritis in Pediatrics Patient - Differential Diagnosis
Malar rash: 
 • A
Diagnosis Malar ... Suggestive of: Rheum Fever ... migrans: • Target sign ... #differential # ... diagnosis #peds
Maculopapular - Diagnostic Algorithm
Pathophysiology:
- Catch-all term with a wide range of potential pathophysiologic mechanisms and causative
erythroderma, petechiae ... , vital sign instability ... - New-onset fever ... sulfa-drug - Skin ... Targetoid #Algorithm #Differential
Papulosquamous Skin Rash - Differential Diagnosis Algorithm
Erythrematous or violaceous papules & plaques with overlying scale
 •
Papulosquamous Skin ... Rash - Differential ... Erythrematous ... Auspitz sign, Koebner's ... Herald's atch • Tinea
Vasculitis and Vasculitides - Differential Diagnosis Framework

When to Consider Vasculitis:
 • Purpura, ischemic skin lesions
 •
: erythematous nodules ... mucositis - Rash ... : • Fevers • ... purpura: strong sign ... differential #diagnosis