What are physical manifestations of flat (plane) nongenital warts?

Updated: Sep 25, 2020
  • Author: Philip D Shenefelt, MD, MS; Chief Editor: William D James, MD  more...
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Flat warts also are termed plane warts or verruca plana. They are characterized as flat or slightly elevated flesh-colored papules that may be smooth or slightly hyperkeratotic. They range from 1-5 mm or more, and numbers range from a few to hundreds of lesions that may become grouped or confluent. These warts may occur anywhere; however, the face, hands, and shins tend to be the most common areas. They may appear in a linear distribution as a result of scratching or trauma (Koebner phenomenon). Regression of these lesions may occur, which usually is heralded by inflammation.

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