Lupus
Pregnancy (EAC usually disappears/stops soon after delivery of baby). Hormone (Contraceptive Pill, Stress, Hormone Drugs)
Lyme disease

Diagnosis
A skin biopsy can be performed to test for EAC; tests should be performed to rule out other possible diseases such as: pityriasis rosea, tinea corporis, psoriasis, nummular eczema, atopic dermatitis, drug reaction, erythema migrans and other rashes. Differential diagnosis
Sarcoidosis
Fungal infection
Lupus erythematosus

Treatment
No treatment is usually needed as they usually go away anywhere from months to years. The lesions may last from anywhere between 4 weeks to 34 years with an average duration of 11 months. If caused by an underlying disease or malignancy, then treating and removing the disease or malignancy will stop the lesions. It usually doesnt require treatment, but topical corticosteroids may be helpful in reducing redness, swelling and itchiness. Some supported and not supported methods of having an effect on EAC include:

Photosensitive so it can be moved/reduced with appropriate sunlight. Vitamin D
Immune system - hence it will increase in size/number when the immune system is low or overloaded. Hormone Drugs
Disulone
Stress reduction
Topical calcipotriol - a topical vitamin D derivative has been known to be beneficial

Epidemiology
It is very rare and estimated to affect 1 in 100,000 per year. Because of its rarity the documentation, cases and information are sparse and not a huge amount is known for certain, meaning that EAC could actually be a set of many un-classified skin lesions. It is known to occur at all ages and all genders equally. Some articles state that women are more likely to be affected than men.
See also
List of cutaneous conditions

References


== External links ==