Erythema nodosum

dermatology

1. Shima’aJaffer Al-Amer
211504748
ERYTHEMA NODOSUM

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. 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. 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. Investigations:
•1-Throat culture for streptococcus
•2-Chest X-ray sarcoidosisand TB
•3-Skin biopsy for difficult cases

6. Treatment:
self-limited disease
symptomatic relief using :

8. •ROXBURGH’S, Common Skin
Disease, R. MARKS
•Medscape
•DermNetNZ
REFRANCES