19 results
Causes of Erythema Nodosum - Mnemonic

NO cause found in 60% of cases
Drugs (antibiotics e.g., sulfonamides, amoxicillin)
Oral
Causes of Erythema ... Nodosum - Mnemonic ... Lofgren's syndrome Ulcerative ... Differential #Diagnosis #Dermatology ... #SkinRash
Erythema Nodosum - Causes and Differential Diagnosis 
Appearance:  erythematous painful lumps usually 1-6 cm in
Erythema Nodosum ... thighs RARELY ulcerate ... #Nodosum #Causes ... Differential Diagnosis #Dermatology ... #SkinRash #Clinical
Reactive Skin Rash - Differential Diagnosis Algorithm
Reactive erythematous with various morphology
 • Urticaria - Firm /
Reactive Skin Rash ... lasts <24hrs • Erythema ... Nodosum - Tender ... #Reactive #SkinRash ... #dermatology #Differential
Vasculitis Involving the Skin - Differential Diagnosis Framework

Primary: 50% Cutaneous Vasculitis: Leukocytoclastic Vasculitis
Secondary: CTD: SLE, RA
vasculitis • Erythema ... polyarteritis nodosa ... Polyarteritis nodosa ... Vasculitis: • Behcet Disease ... #dermatology #rheumatology
Skin Conditions Associated with Joint Pain

Rash
	• Human parvovirus B19 infection

Malar rash
	• SLE
	• Human parvovirus B19 infection
	•
infection • Lyme disease ... Erythema marginatum ... nodosum • Sarcoidosis ... • Crohn's disease ... Sarcoidosis #dermatology
Behçet's Syndrome
Systemic disease associated with inflammation of multiple organs, small-vessel vasculitis and large-vessel vasculopathy
Epidemiology:
 • Young
more): Genital ulceration ... acneiform lesions, erythema ... nodosum (septal ... like lesions, erythema ... , ulcerative colitis
Ulcerative Blastomycosis Skin Lesion
57 asymptomatic M from Indiana nonpruritic, painless, progressive skin lesion lower back x
Ulcerative Blastomycosis ... Skin Lesion 57 ... University Infectious Diseases ... Blastomycosis #SkinRash ... #dermatology #clinical
Pyoderma Gangrenosum: Autoimmune disorder resulting in a vasculitis which causes slowly progressive 
ulceration of the skin.
progressive ulceration ... of the skin. ... number of systemic diseases ... Clinical #Photo #Dermatology ... #SkinRash #Pyoderma
Pyoderma Gangrenosum in Ulcerative Colitis- ...left chest (Panel A) and leg (Panel B). The physical examination
examination revealed skin ... , inflammatory skin ... second most common dermatologic ... after erythema ... nodosum.
Erythemas Summarized
Erythema ab igne
 • A dermatosis that results from repeated exposure to heat (fires, heating
centrifugum • A chronic skin ... early localized disease ... • A chronic skin ... nodosum • Tender ... differential #diagnosis #dermatology