23 results
Erythema Annulare Centrifugum (EAC),
This is erythema annulare centrifugum (EAC), one of the “figurate erythemas.” These lesions
Erythema Annulare ... EAC), This is erythema ... the “figurate erythemas ... Commonly mistaken for tinea ... #skinrash
Tinea Versicolor: Scaly well demarcated patches caused by fungal skin infection.

Charlie Goldberg, M.D. - UCSD Catalog
Tinea Versicolor ... demarcated patches caused ... Images #Clinical ... #Photo #Dermatology ... #SkinRash #Tinea
Tinea Pedis: Scaly red erruption of the feet caused by fungal dermatitis.

Charlie Goldberg, M.D. - UCSD
Tinea Pedis: Scaly ... erruption of the feet caused ... Images #Clinical ... #Photo #Dermatology ... #SkinRash #Tinea
Causes of Erythema Nodosum - Mnemonic

NO cause found in 60% of cases
Drugs (antibiotics e.g., sulfonamides, amoxicillin)
Oral
Causes of Erythema ... Mnemonic NO cause ... Giardiasis #Erythema ... #Differential #Diagnosis ... #Dermatology #SkinRash
Tinea Versicolor (Pityriasis versicolor) 
NOT a dermatophyte infection 
Caused by saprophytic, lipid-dependent yeasts 
Clinical 
 •
Tinea Versicolor ... dermatophyte infection Caused ... recalcitrant) #Tinea ... #Versicolor #Dermatology ... #SkinRash #Diagnosis
Moccasin-variety Tinea Pedis 
70 M chronic scaly feet. Over the years: rash has itched only occasionally;
Moccasin-variety Tinea ... tinea pedis is more ... Moccasin tinea pedis ... hyperkeratotic w/ erythema ... demarcation line of erythema
Erythema Nodosum - Causes and Differential Diagnosis 
Appearance:  erythematous painful lumps usually 1-6 cm in
Erythema Nodosum ... Diagnosis Appearance ... healing process) #Erythema ... #Dermatology #SkinRash ... #Clinical
Erythema Nodosum: In this case, E. Nodosum has occured secondary to 
Streptococcal infection.
Photo credit, Josh Fierer,
Erythema Nodosum ... : In this case, ... Images #Clinical ... #Dermatology #SkinRash ... #Erythema #ENodosum
Erythemas Summarized
Erythema ab igne
 • A dermatosis that results from repeated exposure to heat (fires, heating
Erythema ab igne ... form of delayed-type ... #comparison #table ... #differential #diagnosis ... #dermatology #compared
Reactive Skin Rash - Differential Diagnosis Algorithm
Reactive erythematous with various morphology
 • Urticaria - Firm /
lasts <24hrs • Erythema ... nodules on shins • Erythema ... #Reactive #SkinRash ... #dermatology #Differential ... #causes