32 results
Causes of Erythema Nodosum - Mnemonic

NO cause found in 60% of cases
Drugs (antibiotics e.g., sulfonamides, amoxicillin)
Oral
Causes of Erythema ... Lofgren's syndrome Ulcerative ... Giardiasis #Erythema ... Differential #Diagnosis #Dermatology ... #SkinRash
Erythema Nodosum - Causes and Differential Diagnosis 
Appearance:  erythematous painful lumps usually 1-6 cm in
Erythema Nodosum ... - Causes and Differential ... thighs RARELY ulcerate ... Differential Diagnosis #Dermatology ... #SkinRash #Clinical
Vesiculobullous Skin Rash - Differential Diagnosis Algorithm
Vesicles Fragile/EasiIy Ruptured - Intraepidermal blisters, possibly crusts/erosions
 - Inflammatory
• Contact dermatitis ... Bullous systemic lupus ... Vesiculobullous #SkinRash ... #dermatology #Differential ... Diagnosis #Algorithm #causes
Eczematous Skin Rash - Differential Diagnosis Algorithm
Eczematous - Pruritic/Scaly/Erythematous lesions. Usually poorly demarcated
 • Atopic Dermatitis
) • Nummular Dermatits ... Well-demarcated erythema ... #Eczematous #SkinRash ... #dermatology #Differential ... Diagnosis #Algorithm #causes
Mucous Membrane Disorder - Differential Diagnosis Algorithm
Erosions/Ulcers/Blisters
 - Primary Dermatologic Diseases
     •
Blisters - Primary Dermatologic ... pemphigoid • Erythema ... • Systemic lupus ... bowel disease (ulcerative ... Diagnosis #Algorithm #causes
Contact Dermatitis: Inflammatory response to topical irritant. Note the linear distribution 
across the knuckles, caused by
Contact Dermatitis ... the knuckles, caused ... Images #Clinical #Dermatology ... #SkinRash #Contact ... #Dermatitis #Knuckles
Head and Neck Skin Ulcers - Differential Diagnosis Algorithm
Neoplastic:
 • Squamous cell carcinoma
 • Basal cell
#Neck #Ulcers #ulcerative ... #skinrash #dermatology ... Diagnosis #Algorithm #causes
Tinea Pedis: Scaly red erruption of the feet caused by fungal dermatitis.

Charlie Goldberg, M.D. - UCSD
erruption of the feet caused ... by fungal dermatitis ... Clinical #Photo #Dermatology ... #SkinRash #Tinea
Genital Skin Ulcers - Differential Diagnosis Algorithm
Painful:
 • Herpes simplex
 • Haemophilus ducreyi (chancroid)
 • Behcet's
genitals #Ulcers #ulcerative ... #skinrash #dermatology ... Diagnosis #Algorithm #causes
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