Lichen planus annularis is a skin condition characterized by the presence of annular or ring-shaped lesions on the skin. It is a variant of lichen planus, a chronic inflammatory disorder that affects the skin, mucous membranes, hair, and nails. Lichen planus annularis typically presents as raised, reddish-purple or pink lesions that may be itchy or tender.
The exact cause of lichen planus annularis is unknown, but it is believed to be an autoimmune reaction where the body's immune system mistakenly attacks its own tissues. It may also be triggered by certain medications, infections, or underlying medical conditions.
The lesions of lichen planus annularis are typically symmetrical in appearance and may form in clusters or spread to other areas of the body. They often have a distinct border and may have a fine scale or central clearing. In some cases, the lesions may become hyperpigmented or develop a whitish color.
Diagnosis of lichen planus annularis is primarily based on clinical examination and may require a skin biopsy for confirmation. Treatment options may include topical corticosteroids, oral antihistamines, or other immune-modulating medications to alleviate symptoms and reduce inflammation. However, as lichen planus annularis is a chronic condition, it may persist or recur despite treatment.
Monitoring and follow-up with a dermatologist is important to manage the condition and assess for any potential complications. Although lichen planus annularis is not contagious or life-threatening, it can cause discomfort and may affect the quality of life of individuals affected by the condition.
