Disc-shaped psoriasis (lat. psoriasis discoidea) is one of the types of psoriasis in which round plaques with a diameter of 1-3 cm form on the skin. This type of psoriasis is also called coin-shaped because of the characteristic shape of the rash.
With discoid psoriasis, individual, clearly defined, round or oval plaques of bright red color appear on the skin. The surface of the plaques is covered with silvery-white scales that peel off easily.
Most often, the rashes are localized on the extensor surfaces of the limbs, in the area of the elbow and knee joints. Less commonly, the skin of the torso, scalp and face are affected.
The causes of discoid psoriasis are not fully understood. It is believed that the main role is played by genetic predisposition and the action of provoking factors - stress, infections, skin injuries, taking certain medications.
Diagnosis is based on the characteristic clinical picture. Histological examination of a skin biopsy may be performed to confirm the diagnosis.
Treatment includes external therapy with corticosteroid and tar preparations, phototherapy. For common forms, systemic immunosuppressants and biological drugs are prescribed. It is important to follow a hypoallergenic diet and avoid provoking factors.
The prognosis for discoid psoriasis is generally favorable. The disease is benign, but has a tendency to relapse. Timely treatment allows you to achieve stable remission.
Disc psoriasis (discoid or coin-shaped skin disease) is a chronic inflammation of the skin that can occur anywhere on the body. It is considered a primary chronic skin disease (according to modern nomenclature). Most often, skin plaques (red/pink discs raised above the skin level) are located on the skin covered with hair - the scalp, less often - on open parts of the body (face, torso, limbs), as well as on mucous membranes, nails and/or organs small pelvis. Usually it is not located on the scalp, since it occurs in representatives of the white race only in 2-5% of cases.
Most often, skin rashes appear on the head, hips, elbows, knees, and on the mucous membrane of the genitals and anus. Appearance of skin manifestations in individuals