Psoriasis orbicularis, also known as annular or circinate psoriasis, is a type of psoriasis that primarily affects the skin, causing distinctive circular or ring-shaped patches. It is a chronic inflammatory skin condition characterized by patches of red, itchy, scaly, and sometimes painful skin. These patches have well-defined borders and often appear on the extremities, such as the elbows, knees, and scalp.
Psoriasis orbicularis is classified as a variant of plaque psoriasis, which is the most common form of psoriasis. However, it is distinguished by its circular or annular shape. This type of psoriasis typically starts as small red papules that gradually expand in a ring-like pattern, with the center portion often clearing up while the outer edges remain active. The patches may vary in size and can merge together, forming larger affected areas.
The exact cause of psoriasis orbicularis is still unclear, but it is believed to involve an abnormal immune response that triggers the accelerated growth of skin cells. Certain factors, such as genetic predisposition, stress, infections, and certain medications, can exacerbate the condition. Psoriasis orbicularis is a chronic condition that tends to have a fluctuating course, with periods of remission and flare-ups.
Treatment for psoriasis orbicularis aims to alleviate symptoms, reduce the inflammation, and slow down the skin cell growth cycle. It may involve topical treatments, such as corticosteroids, vitamin D analogs, and moisturizers, as well as systemic therapies like oral medications or biologic agents. Phototherapy, which uses ultraviolet light, can also be beneficial in managing this condition. Psoriasis orbicularis may require long-term management to control symptoms and prevent complications.
