Which of the following is a cutaneous manifestation of lichen planus?

Lichen planus is an inflammatory condition that primarily affects the skin and mucous membranes. One of its hallmark cutaneous manifestations is the appearance of pruritic (itchy), purple, polygonal papules. These lesions are typically flat-topped and can vary in size, often appearing on the wrists, ankles, lower back, and oral mucosa.

The characteristic color and shape of these lesions are key features that help distinguish lichen planus from other skin conditions. The polygonal nature refers to the angular edges of the lesions, and the intense pruritus often accompanies them, which adds to the discomfort of individuals affected by this condition.

In contrast, the other options present different skin conditions that do not share the same defining characteristics as lichen planus. Fungal infections typically cause lesions that are scaly and may have other specific features depending on the organism causing the infection. Psoriatic patches are usually well-defined, raised, and covered with silvery scales, while urticaria presents as wheals and flares, often transient and associated with a different underlying mechanism. Thus, the correct choice highlights the specific and distinctive features of lichen planus.