Skin plaque

Skin Plaque is a term used in dermatology to describe a specific type of skin lesion that is characterized by its elevated, flat-topped appearance. Skin plaques are typically larger than 1 cm in diameter and can occur in various conditions, including psoriasis, eczema, and lichen planus.

Definition

A skin plaque is defined as a broad, raised area of skin that is often a characteristic feature of certain skin diseases. Unlike a papule, which is smaller and more distinct, a skin plaque is usually larger and may have a flat or slightly rounded top. The surface of a skin plaque can vary, depending on the underlying condition, and may be smooth, rough, or scaly.

Causes

Skin plaques can be caused by a variety of conditions, including:

• Psoriasis: This is a chronic skin condition that causes skin cells to multiply up to 10 times faster than normal, resulting in red, scaly patches of skin that may form plaques.
• Eczema: Also known as atopic dermatitis, this condition can cause skin to become inflamed, itchy, and scaly, leading to the formation of plaques.
• Lichen Planus: This condition can cause flat-topped, purple plaques to form on the skin, particularly on the wrists and ankles.

Diagnosis

Diagnosis of skin plaques typically involves a physical examination by a dermatologist. The doctor may also take a skin biopsy to examine the tissue under a microscope and confirm the diagnosis. In some cases, additional tests may be needed to determine the underlying cause of the skin plaques.

Treatment

Treatment for skin plaques depends on the underlying cause. For conditions like psoriasis and eczema, treatment may involve topical creams, light therapy, or systemic medications. For lichen planus, treatment may involve corticosteroids or other medications to reduce inflammation.

See Also

• Skin Lesion
• Dermatology
• Psoriasis
• Eczema
• Lichen Planus