12 results
Christmas Tree Rash of Pityriasis rosea
 - small oval scaling patches
 - Christmas tree pattern
 -
Christmas Tree Rash ... - long axis of lesion ... parallel to lines of skin ... - Differential diagnosis ... : secondary syphilis
Ulcerative Blastomycosis Skin Lesion
57 asymptomatic M from Indiana nonpruritic, painless, progressive skin lesion lower back x
Blastomycosis Skin ... Denies any travel ... Lives in an old ... Diagnosis? ... Blastomycosis #SkinRash #dermatology
Cold Urticaria
Prevalence - 0.05% in the population
Disease onset - Mostly 2nd to 4th decades of life
Causes
lesions - Wheals ... Disorientation, vertigo Diagnostic ... #Urticaria #diagnosis ... #rheumatology # ... comparison #table
Secondary Syphilis Rash
Secondary syphilis is the most contagious of all the stages of this disease, and
Rash Secondary ... Skin rash and malaise ... heaped, wart-like lesions—Condyloma ... #Rash #Diagnosis ... Clinical #Photo #Dermatology
Causes of Petechial Rash - Differential Diagnosis Algorithm

Pinpoint areas (less than 2 mm) of hemorrhage, which
- Differential Diagnosis ... reddish-purple lesions ... in primary or secondary ... cryoglobulins • Skin ... #Differential #Diagnosis
Pigmented Purpuric Dermatoses (PPD) - Capillaritis

Group of chronic, benign, cutaneous eruptions characterized by the presence of
brown tint of the rash ... annular, purpuric lesions ... erythematous punctate lesions ... #differential #diagnosis ... #dermatology
Papulosquamous Skin Rash - Differential Diagnosis Algorithm
Erythrematous or violaceous papules & plaques with overlying scale
 •
Papulosquamous Skin ... Rash - Differential ... Diagnosis Algorithm ... (Ring- shaped) lesion ... central clearing • Secondary
Eczematous Skin Rash - Differential Diagnosis Algorithm
Eczematous - Pruritic/Scaly/Erythematous lesions. Usually poorly demarcated
 • Atopic Dermatitis
Eczematous Skin ... Rash - Differential ... Diagnosis Algorithm ... Scaly/Erythematous lesions ... Secondary to venous
Pustular Skin Lesions - Differential Diagnosis Framework

What are pustules?
• Pustules < 5-10 mm + pus
• Material
Pustular Skin Lesions ... - Differential Diagnosis ... Generalized itchy rash ... Secondary syphilis ... #Diagnosis #Dermatology
Scleroderma Like Conditions - Differential Diagnosis
Eosinophilic Fasciitis:
 - Orange peel induration (peau d'orange) of proximal extremities
- Differential Diagnosis ... Systemic Fibrosis: - Secondary ... lesions, or localized ... #comparison #table ... #dermatology