9 results
Causes of Erythema Nodosum - Mnemonic

NO cause found in 60% of cases
Drugs (antibiotics e.g., sulfonamides, amoxicillin)
Oral
Causes of Erythema Nodosum ... Lofgren's syndrome Ulcerative ... HepB, HepC Bacterial ... #Differential #Diagnosis ... #Dermatology #SkinRash
Erythema Nodosum - Causes and Differential Diagnosis 
Appearance:  erythematous painful lumps usually 1-6 cm in
Erythema Nodosum ... and Differential Diagnosis ... thighs RARELY ulcerate ... #Erythema #Nodosum ... #Dermatology #SkinRash
Skin Ulcers by Etiology - Differential Diagnosis Algorithm
Physical:
 • Trauma
 • Pressure
 • Radiation
Vascular:
 • Arterial
- Differential Diagnosis ... Herpes simplex - Bacterial ... Cryptococcosis #Ulcers #ulcerative ... #skinrash #dermatology ... #Differential #Diagnosis
Skin Ulcers of the Lower Legs / Feet - Differential Diagnosis Algorithm
Physical:
• Pressure
• Trauma
• Radiation
Vascular:
• Arterial
- Differential Diagnosis ... Vascular: • Arterial ... #Feet #Ulcers #ulcerative ... #skinrash #dermatology ... #Differential #Diagnosis
Highlighted Conditions With Arteritis or Periarteritis of the Coronaries
Takayasu's arteritis:
 - Onset < 40 yrs
 -
claudication - Arterial ... Polyarteritis nodosa ... genital Sores - Ulceration ... thrombosis IgG4 ... #Differential #Diagnosis
Pyoderma Gangrenosum in Ulcerative Colitis- ...left chest (Panel A) and leg (Panel B). The physical examination
Gangrenosum in Ulcerative ... were negative for bacterial ... A diagnosis of pyoderma ... second most common dermatologic ... after erythema nodosum
Dermatologic Manifestations of Granulomatosis with Polyangiitis (GPA)

Skin involvement in granulomatosis with polyangiitis (GPA) is common and
extremities, and the extensor ... Bullae/Blisters • Ulceration ... Differential Diagnosis ... Polyarteritis nodosa ... #rash #diagnosis
Behçet's Syndrome
Systemic disease associated with inflammation of multiple organs, small-vessel vasculitis and large-vessel vasculopathy
Epidemiology:
 • Young
more): Genital ulceration ... lesions, erythema nodosum ... Vascular Disease: Arterial ... syndrome, dural sinus thrombosis ... Crohn disease, ulcerative
Erythemas Summarized
Erythema ab igne
 • A dermatosis that results from repeated exposure to heat (fires, heating
back of hands, extensor ... medications Erythema nodosum ... of the pustular material ... #differential #diagnosis ... #dermatology #compared