11 results
Erythema Annulare Centrifugum (EAC),
This is erythema annulare centrifugum (EAC), one of the “figurate erythemas.” These lesions
classic trailing scale ... Commonly mistaken for tinea ... Classically has a rim of scale ... #clinical #photo ... #dermatology #skinrash
Eczematous Skin Rash - Differential Diagnosis Algorithm
Eczematous - Pruritic/Scaly/Erythematous lesions. Usually poorly demarcated
 • Atopic Dermatitis
Eczematous Skin ... Rash - Differential ... Well-demarcated erythema ... #Eczematous #SkinRash ... #dermatology #Differential
Vesiculobullous Skin Rash - Differential Diagnosis Algorithm
Vesicles Fragile/EasiIy Ruptured - Intraepidermal blisters, possibly crusts/erosions
 - Inflammatory
Vesiculobullous Skin ... blisters, possibly crusts ... Bullous systemic lupus ... Vesiculobullous #SkinRash ... #dermatology #Differential
Common Dermatological Conditions - Distribution and Morphology
 • Acne vulgaris - Face, upper back, chest -
honey-colored crusts ... • Tinea versicolor ... with site, (e.g„ tinea ... ; pruritis #dermatology ... #rash #differential
Pustular Skin Rash - Differential Diagnosis Algorithm
Pruritic / Scaly / Erythematous lesions, usually poorly demarcated
Acneiform -
Pustular Skin Rash ... Pruritic / Scaly ... thick honey-yellow crusts ... #Pustular #SkinRash ... #dermatology #Differential
Allopecia - Differential Diagnosis Framework for Hair Loss

Localized / Focal Hair Loss Pattern:
 • Scarring Alopecia:
Allopecia - Differential ... cellulitis of the scalp ... Capitis - Skin ... , erosions, or erythema ... #Diagnosis #dermatology
Hair Loss (Alopecia) - General (Diffuse and Focal) Differential Diagnosis Algorithm

DIFFUSE
Scarring - Irreversible-biopsy required
 • Lupus
Diffuse and Focal) Differential ... Diagnosis Algorithm ... Alopecia totalis (all scalp ... - Secondary to Skin ... HairLoss #Alopecia #dermatology
Moccasin-variety Tinea Pedis 
70 M chronic scaly feet. Over the years: rash has itched only occasionally;
skin of inflamed ... hyperkeratotic w/ erythema ... allergic eczematous dermatitis ... type #clinical #photo ... #foot #dermatology
Papulosquamous Skin Rash - Differential Diagnosis Algorithm
Erythrematous or violaceous papules & plaques with overlying scale
 •
Papulosquamous Skin ... Herald's atch • Tinea ... soles • Discoid Lupus ... Papulosquamous #SkinRash ... #dermatology #Differential
Focal / Localized Hair Loss (Alopecia) - Differential Diagnosis Algorithm

Scarring - Irreversible-biopsy required
 - Infectious
Diagnosis Algorithm ... - Secondary to Skin ... • Discoid lupus ... • Aplasia cutis ... Focal #Localized #dermatology