What is the characteristic appearance of lichen planus?

Lichen planus is characterized by its distinctive purple, polygonal papules. These lesions commonly appear on the skin and have a flat-topped profile with a shiny surface. In addition to their polygonal shape, they often exhibit a prominent network of white lines called Wickham striae. This unique presentation helps differentiate lichen planus from other skin conditions, leading to a more accurate diagnosis.

The lesions can also occur on mucosal surfaces, such as the oral cavity, where they may appear as white, reticular patches. However, the defining feature when discussing lichen planus is the papular lesions on the skin that display that specific purple color and polygonal shape. Understanding these characteristics is crucial in clinical settings for timely recognition and management of the condition.