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Erthyma nodosum

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presentation done by student for derma course

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Erthyma nodosum

  1. 1. Shima’a Jaffer Al-Amer 211504748 ERYTHEMA NODOSUM
  2. 2. What is Erythema Nodosum? • A painful inflammatory disorder in which crops of tender nodules occur in response to antigenic stimuli. • Usually it is limited to the extensor aspects of the lower legs.
  3. 3. Causes: • Hypersensitivity reaction 1- Infection: Streptcoccus, Mycoplasma pneumoniae 2- certain medication: • Antibiotic e.g. amoxicillin • Sulfonamides • Birth control pills 3- pregnancy 4- sarcoidosis 5- leukemia 6- Ulcerative colitis
  4. 4. Clinical presentation: 1- At the beginning: * red tender nodules , * poorly Defined border, * vary from 2-6 cm. 2- During the first week: lesions become tense, hard, and painful 3- During the second week: they may become fluctuant, as in an abscess, but do not suppurate or ulcerate. 4- Aching legs and swelling ankles may persist for weeks.
  5. 5. Investigations: • 1- Throat culture  for streptococcus • 2- Chest X-ray  sarcoidosis and TB • 3- Skin biopsy  for difficult cases
  6. 6. Treatment: self-limited disease symptomatic relief using :
  7. 7. • ROXBURGH’S, Common Skin Disease, R. MARKS • Medscape • DermNet NZ REFRANCES

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