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A plantar wart also known as veruca, myrmecia and ''veruca plantaris'' is a wart caused by the human papillomavirus (HPV) occurring on the sole (Latin ''planta'') or toes of the foot. HPV infections in other locations are not plantar; see human papillomavirus. Plantar warts are usually self-limiting, but treatment is generally recommended to lessen symptoms (which may include pain), decrease duration, and reduce transmission. Infection occurs in an estimated 7–10% of the US population, and genetics plays an important role in determining susceptibility. ==Cause== Plantar warts are benign epithelial tumors generally caused by infection by human papilloma virus types 1, 2, 4, 60, or 63, but have also been caused by types 57, 65, 66, and 156. These types are classified as clinical (visible symptoms). The virus attacks compromised skin through direct contact, entering through possibly tiny cuts and abrasions in the stratum corneum (outermost layer of skin). After infection, warts may not become visible for several weeks or months. Because of pressure on the sole of the foot or finger, the wart is pushed inward and a layer of hard skin may form over the wart. A plantar wart can be painful if left untreated. Warts may spread through autoinoculation, by infecting nearby skin or by infected walking surfaces. They may fuse or develop into clusters called mosaic warts. Veruca right foot detail.jpg|A plantar wart. Striae (fingerprints) go around the lesion. File:Plantarwartscluster.jpg|Mosaic warts cluster File:Wart-IMG 1676.JPG|Young plantar warts |Anatomy of a plantar wart. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「plantar wart」の詳細全文を読む スポンサード リンク
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