|Erythema nodosum in a person who had recently had streptococcal pharyngitis|
|Classification and external resources|
Erythema nodosum (EN), also known as subacute migratory panniculitis of Vilanova and Piñol, is an inflammatory condition characterised by inflammation of the fat cells under the skin, resulting in tender red nodules or lumps that are usually seen on both shins. It can be caused by a variety of conditions, and typically resolves spontaneously within 30 days. It is common in young people between 12–20 years of age.
Signs and symptoms
Erythema nodosum is characterised by 1–2-inch (25–51 mm) nodules (rounded lumps) below the skin surface, usually on the shins. These subcutaneous nodules can appear anywhere on the body, but the most common sites are the shins, arms, thighs, and torso. Each nodule typically disappears after around two weeks, though new one may continue to form for up to six or eight weeks. A new nodule usually appears red and is hot and firm to touch. The redness starts to fade and it gradually becomes softer and smaller until it disappears. Each nodule usually heals completely without scarring over the course of about two weeks. Joint pain and inflammation sometimes continues for several weeks or months after the nodules appear.
Less common variants of erythema nodosum include:
- Ulcerating forms, seen in Crohn's disease
- Erythema contusiforme, when a subcutaneous hemorrhage (bleeding under the skin) occurs with a erythema nodosum lesion, causing the lesion to look like a contusion (bruise)
- Erythema nodosum migrans (also known as subacute nodular migratory panniculitis), a rare form of chronic erythema nodosum characterized by asymmetrical nodules that are mildly tender and migrate over time.
EN is associated with a wide variety of conditions, including:
In about 30–50% of cases, the cause of EN is unknown.
- Streptococcal infection which, in children, is by far the most common precipitant,
- Primary infection of Tuberculosis
- Mycoplasma pneumoniae
- Histoplasma capsulatum
- Epstein-Barr virus
- Coccidioides immitis (Valley fever)
- Cat scratch disease
- Cancer, including
There is an association with the HLA-B27 histocompatibility antigen, which is present in 65% of patients with erythema nodosum.
A useful mnemonic for causes is SORE SHINS (Streptococci, OCP, Rickettsia, Eponymous (Behçet), Sulfonamides, Hansen's Disease (Leprosy), IBD, NHL, Sarcoidosis.
Erythema nodosum is probably a delayed hypersensitivity reaction to a variety of antigens. Although circulating immune complexes have been demonstrated in patients with inflammatory bowel disease, they have not been found in idiopathic or uncomplicated cases.
Erythema nodosum is diagnosed clinically. A biopsy can be taken and examined microscopically to confirm an uncertain diagnosis. Microscopic examination usually reveals a neutrophilic infiltrate surrounding capillaries that results in septal thickening, with fibrotic changes in the fat around blood vessels. A characteristic microscopic finding is radial granulomas, well-defined nodular aggregates of histiocytes surrounding a stellate cleft.
Additional evaluation should be performed to determine the underlying cause of erythema nodosum. This may include a full blood count, erythrocyte sedimentation rate (ESR), antistreptolysin-O (ASO) titer and throat culture, urinalysis, intradermal tuberculin test, and a chest x-ray. The ESR is typically high, the C-reactive protein elevated, and the blood showing an increase in white blood cells.
The ESR is initially very high, and falls as the nodules of erythema nodosum. The ASO titer is high in cases associated with a streptococcal throat infection. A chest X-ray should be performed to rule out pulmonary diseases, in particular sarcoidosis and Löfgren syndrome.
Erythema nodosum is self-limiting and usually resolves itself within 3–6 weeks. A recurring form does exist, and in children it is attributed to repeated infections with streptococcus. Treatment should focus on the underlying cause. Symptoms can be treated with bedrest, leg elevation, compressive bandages, wet dressings, and nonsteroidal anti-inflammatory agents (NSAIDs). NSAIDs are usually more effective at the onset of EN versus with chronic disease.
Potassium iodide can be used for persistent lesions whose cause remains unknown. Corticosteroids and colchicine can be used in severe refractory cases. Thalidomide has been used successfully in the treatment of Erythema nodosum leprosum, and it was approved by the U.S. FDA for this use in July 1998.
The term, Subacute Migratory Panniculitis of Vilanova and Piñol, was named after the two famous Catalan Dermatologist who provided a brief description and explanation of the disease, Drs. Xavier Montiu Vilanova (1902–1965) and Joaquin Aguade Piñol (1918–1977), in 1954, and was named in 1956.
- Pedro-Pons, Agustín (1968). Patología y Clínica Médicas (in Spanish). 6 (3rd ed.). Barcelona: Salvat. p. 193. ISBN 84-345-1106-1.
- "Information for Families Erythema nodosum". Great Ormond Street Hospital for Children NHS Foundation Trust. GOSH NHS Foundation Trust. April 2012. Ref: 2012F1224.
- Fitzpatrick, Thomas B. (2005). Fitzpatrick's color atlas and synopsis of clinical dermatology (5th ed.). New York: McGraw-Hill. p. 148. ISBN 0-07-144019-4.
- Schwartz, R. A.; Nervi, S. J. (2007). "Erythema nodosum: A sign of systemic disease". American Family Physician. 75 (5): 695–700. PMID 17375516.
- Gilchrist, Heidi; Patterson, James W. (2010). "Erythema nodosum and erythema induratum (nodular vasculitis): Diagnosis and management". Dermatologic Therapy. 23 (4): 320–7. doi:10.1111/j.1529-8019.2010.01332.x. PMID 20666819.
- Rapini, Ronald P.; Bolognia, Jean L.; Jorizzo, Joseph L. (2007). Dermatology: 2-Volume Set. St. Louis: Mosby. ISBN 1-4160-2999-0.[page needed]
- William D. James; Timothy G. Berger; Dirk M. Elston. Andrews' Diseases of the skin : clinical dermatology (11th ed.). [London]: Saunders/ Elsevier. p. 488. ISBN 1-4377-0314-3.
- Mert, Ali; Ozaras, Resat; Tabak, Fehmi; Pekmezci, Salih; Demirkesen, Cuyan; Ozturk, Recep (2009). "Erythema Nodosum: An Experience of 10 Years". Scandinavian Journal of Infectious Diseases. 36 (6–7): 424–7. doi:10.1080/00365540410027184. PMID 15307561.
- Bohn, S; Büchner, S; Itin, P (1997). "Erythema nodosum: 112 cases. Epidemiology, clinical aspects and histopathology". Schweizerische medizinische Wochenschrift. 127 (27–28): 1168–76. PMID 9324739.
- Rogerson, S J; Nye, F J (1990). "Hepatitis B vaccine associated with erythema nodosum and polyarthritis". BMJ. 301 (6747): 345. doi:10.1136/bmj.301.6747.345. PMC . PMID 2144199.
- Kumar, Vinay; Abbas, Abul K.; Fausto, Nelson; Aster, Jon C. (2009). Robbins and Coltran Pathological Basis of Disease. pp. 372–3. ISBN 978-1-4160-4930-2.
- Cunha, Burke A. (1999). Infectious disease pearls. Philadelphia: Hanley & Belfus. p. 105. ISBN 978-1-56053-203-3.
- Dr Kevin McCarthy, Cork, Ireland or DIPOUT: Drugs (e.g. sulfonamides), Infections (e.g. strep), Pregnancy, OCP, Ulcerative colitis, TB[full citation needed]
- Nguyen, Geoffrey C.; Torres, Esther A.; Regueiro, Miguel; Bromfield, Gillian; Bitton, Alain; Stempak, Joanne; Dassopoulos, Themistocles; Schumm, Philip; Gregory, Federico J.; Griffiths, Anne M.; Hanauer, Stephen B.; Hanson, Jennifer; Harris, Mary L.; Kane, Sunanda V.; Orkwis, Heather Kiraly; Lahaie, Raymond; Oliva-Hemker, Maria; Pare, Pierre; Wild, Gary E.; Rioux, John D.; Yang, Huiying; Duerr, Richard H.; Cho, Judy H.; Steinhart, A. Hillary; Brant, Steven R.; Silverberg, Mark S. (2006). "Inflammatory Bowel Disease Characteristics Among African Americans, Hispanics, and Non-Hispanic Whites: Characterization of a Large North American Cohort". The American Journal of Gastroenterology. 101 (5): 1012–23. doi:10.1111/j.1572-0241.2006.00504.x. PMID 16696785.
- García-Porrúa, Carlos; González-Gay, Miguel A.; Vázquez-Caruncho, Manuel; López-Lazaro, Luis; Lueiro, Mercedes; Fernández, Maria L.; Alvarez-Ferreira, Javier; Pujol, Ramón M. (2000). "Erythema nodosum: Etiologic and predictive factors in a defined population". Arthritis & Rheumatism. 43 (3): 584–92. doi:10.1002/1529-0131(200003)43:3<584::AID-ANR15>3.0.CO;2-6. PMID 10728752.
- Mat, C.; Yurdakul, S; Uysal, S; Gogus, F; Ozyazgan, Y; Uysal, O; Fresko, I; Yazici, H (2005). "A double-blind trial of depot corticosteroids in Behcet's syndrome". Rheumatology. 45 (3): 348–52. doi:10.1093/rheumatology/kei165. PMID 16263779.
- Yurdakul, Sebahattin; Mat, Cem; Tüzün, Yalçin; Özyazgan, Yilmaz; Hamuryudan, Vedat; Uysal, Ömer; Şenocak, Mustafa; Yazici, Hasan (2001). "A double-blind trial of colchicine in Behçet's syndrome". Arthritis & Rheumatism. 44 (11): 2686–92. doi:10.1002/1529-0131(200111)44:11<2686::AID-ART448>3.0.CO;2-H. PMID 11710724.
- Silverman, W. A. (2002). "The Schizophrenic Career of a 'Monster Drug'". Pediatrics. 110 (2): 404–6. doi:10.1542/peds.110.2.404. PMID 12165600.
- Rouhi, Maureen (2005). "Thalidomide". Chemical & Engineering News Archive. 83 (25): 122. doi:10.1021/cen-v083n025.p122.
- Goldman, Lee. Goldman's Cecil Medicine (24th ed.). Philadelphia: Elsevier Saunders. p. 915. ISBN 1-4377-2788-3.
- Subacute Nodular Migratory Panniculitis (Vilanova Disease) at eMedicine
- Mascaró, J. M. (1978). "In memoriam Joaquin Piñol Aguadé, 1918--1977". Der Hautarzt; Zeitschrift fur Dermatologie, Venerologie, und verwandte Gebiete. 29 (11): 613–4. PMID 363649.
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