A. Erythema Nodosum

1. Sarcoidosis
2. Inflammatory bowel disease
3. Drugs
4. Infectious disease
5. Idiopathic

B. Pancreatic Disorders [2]

1. Acute pancreatitis
2. Chronic pancreatitis
3. Pancreatic pseudocyst
4. Ductal adenocarcinoma
5. Acinar-cell carcinoma
6. Islet-cell tumor

C. Bacterial and Fungal Infection

1. Erythema induratum (panniculitis with vasculitis)
2. Associated with Mycobacterium tuberculosis infection
3. Erythema nodosum

D. Genetic Disorders

1. Alpha1-antitrypsin deficiency
2. Weber-Christian Disease
   1. Relapsing febrile nodular panniculitis
   2. Outdated term for panniculitis with systemic symptoms

E. Other Inflammatory Disorders

1. Systemic lupus erythematosus
2. Vasculitis

F. Miscellaneous

1. Chemical injury at injection sites
2. Subcutaneous panniculitis-like T cell lymphoma
3. Lipoma
4. Lipodystrophy

References

1. Jacobson JO and De Leval L. 2001. NEJM. 345(19):1409 (Case Record)
2. Ashley SW and Lauwers GY. 2002. NEJM. 347(22):1783 (Case Record)