121 results
Erythema Nodosum: In this case, E. Nodosum has occured secondary to 
Streptococcal infection.
Photo credit, Josh Fierer,
Erythema Nodosum ... Nodosum has occured ... Dermatology #SkinRash #Erythema ... #ENodosum #Photo
Causes of Erythema Nodosum - Mnemonic

NO cause found in 60% of cases
Drugs (antibiotics e.g., sulfonamides, amoxicillin)
Oral
Causes of Erythema ... Nodosum - Mnemonic ... Giardiasis #Erythema ... #Nodosum #Mnemonic
Erythema Nodosum - Causes and Differential Diagnosis 
Appearance:  erythematous painful lumps usually 1-6 cm in
Erythema Nodosum ... healing process) #Erythema ... #Nodosum #Causes
Red Leg - Cellulitis Mimickers
 - Unilateral
     • Contact Dermatitis
Acute Gout • Erythema ... Nodosum • ... Arthritis • Erythema
Löfgren Syndrome in Sarcoidosis
 • Hilar Lymphadenopathy 
 • Acute Polyarthritis (usually ankles)
 • Erythema Nodosum
joo
usually ankles) • Erythema ... Nodosum joo
Reactive Skin Rash - Differential Diagnosis Algorithm
Reactive erythematous with various morphology
 • Urticaria - Firm /
lasts <24hrs • Erythema ... Nodosum - Tender ... nodules on shins • Erythema
Dermatologic Extraintestinal Manifestations in IBD - IBD Algorithm

Erythema Nodosum
Pyoderma Gangrenosum
Metastatic Crohn's Disease
Sweet Syndrome
EBA

Dr. Wade Billings @wabillin

#Dermatologic
IBD Algorithm Erythema ... Nodosum Pyoderma
Erythemas Summarized
Erythema ab igne
 • A dermatosis that results from repeated exposure to heat (fires, heating
Erythemas Summarized ... Erythema ab igne ... Erythema annulare ... Erythema arthriticum ... nodosum • Tender
Causes of Erythema Nodosum
Common
 - Idiopathic (up to 55 percent)
 - Infections: streptococcal pharyngitis (28 to
Causes of Erythema ... Nodosum Common ... malignancies #Erythema ... #Nodosum #Causes
Skin Conditions Associated with Joint Pain

Rash
	• Human parvovirus B19 infection

Malar rash
	• SLE
	• Human parvovirus B19 infection
	•
Dermatomyositis Erythema ... Lyme disease Erythema ... Eosinophilic fasciitis Erythema ... nodosum • Sarcoidosis