What type of lesion is typically larger than a papule and has a flat top?

A plaque is characterized as a lesion that is larger than a papule and has a flat top. The elevation of a plaque is often broad and flat, resembling a plateau. This distinguishes it from other types of lesions that may be raised and rounded, such as nodules or papules.

Plaques can vary in size, but they are generally defined as being greater than 1 centimeter in diameter. They often form from the fusion of multiple smaller lesions, resulting in a larger, more pronounced area of abnormal skin. This feature is commonly seen in various dermatological conditions, such as psoriasis or eczema, where plaques can be prominent on the surface of the skin due to the accumulation of keratinocytes or inflammation.

Other options like pustules, nodules, and vesicles describe lesions with different characteristics. Pustules contain pus, nodules are solid, elevated masses that are usually deeper in the skin, and vesicles are filled with fluid and typically smaller than both papules and plaques. Each of these has distinct definitions and visual presentations that do not align with the flat-topped, larger nature of a plaque.