Pityriasis amiantacea

Pityriasis Amiantacea

Pityriasis amiantacea (pronunciation: pit-uh-rye-uh-sis am-ee-an-tay-see-uh) is a rare and distinctive skin condition characterized by the presence of thick, adherent, silver-white scales that resemble asbestos. The term is derived from the Greek words "pityron", meaning bran, and "amiantos", meaning asbestos.

Etiology

The exact cause of Pityriasis amiantacea is unknown. However, it is often associated with various underlying scalp conditions such as psoriasis, seborrheic dermatitis, and tinea capitis. It can also occur in association with atopic dermatitis and lichen planus.

Clinical Features

Pityriasis amiantacea typically presents with thick, silvery scales that tightly adhere to the hair shafts. These scales can cover the entire scalp or only certain areas. Hair loss is common in the affected areas, but it is usually temporary. Other symptoms may include itching, redness, and inflammation of the scalp.

Diagnosis

Diagnosis of Pityriasis amiantacea is primarily based on the clinical presentation. A skin biopsy may be performed to rule out other conditions. Dermoscopy can also be helpful in the diagnosis.

Treatment

Treatment of Pityriasis amiantacea involves managing the underlying condition, if known. Topical treatments such as keratolytics, corticosteroids, and antifungals are commonly used. In severe cases, systemic therapy may be required.

Prognosis

The prognosis of Pityriasis amiantacea is generally good. With appropriate treatment, the condition usually resolves within a few weeks to months. However, recurrence is common, especially if the underlying condition is not adequately managed.

Related Terms

External links

Medical encyclopedia article on Pityriasis amiantacea
Wikipedia's article - Pityriasis amiantacea

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Pityriasis amiantacea