Flat warts, technically known as verruca plana, are reddish-brown or flesh-colored, slightly raised, flat-surfaced, well-demarcated papule of 2 to 5 mm in diameter.

Upon close inspection, these lesions have a surface that is "finely verrucous".

[1][2] Most often, these lesions affect the hands, legs, or face, and a linear arrangement is not uncommon.

[2] At histopathology, flat warts have cells with prominent perinuclear vacuolization around pyknotic, basophilic, centrally located nuclei that may be located in the granular layer.

"[3] This infection-related cutaneous condition article is a stub.