| Synonyms: | Verruca plana |
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] These are referred to as "owl's eye cells."[3]