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Flat wart
Other names	Verruca plana
Verruca plana (flat warts) on the chin of a middle-aged woman
Specialty	Dermatology

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". Most often, these lesions affect the hands, legs, or face, and a linear arrangement is not uncommon. At histopathology, flat warts have cells with prominent perinuclear vacuolization around pyknotic, basophilic, centrally located nuclei that may be located in the granular layer. These are referred to as "owl's eye cells."

Additional images

• Micrograph of a flat wart
• Woman with extensive flat warts on her face

References

1. Rapini, Ronald P.; Bolognia, Jean L.; Jorizzo, Joseph L. (2007). Dermatology: 2-Volume Set. St. Louis: Mosby. p. 1188. ISBN 978-1-4160-2999-1.
2. ^ Lookingbill, Donald, et al. Principles of Dermatology. Saunders. 2000. Pages 68-69. ISBN 0-7216-7971-4.
3. ^ Ahmad M. Al Aboud; Pramod K. Nigam (2021). "Wart". Wart (Plantar, Verruca Vulgaris, Verrucae). StatPearls. PMID 28613701. {{cite book}}: |website= ignored (help)CS1 maint: multiple names: authors list (link) Last Update: May 13, 2019.

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