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Plantar warts are benign epithelial tumors generally caused by infection by human papillomavirus types 1, 2, 4, 60, or 63, [6] but also by types 57, [7] 65, [8] 66, [9] and 156. [10] These types are classified as clinical (visible symptoms).
The bumps tend to be flat, grow in number, and then merge to form plaques. [1] On the trunk, it typically appears like pityriasis versicolor; lesions are slightly scaly and tan, brown, red, or looking pale. [1] On the elbows, it may appear like psoriasis. [1] On the forehead, neck, and trunk, the lesions may appear like seborrheic keratosis. [1]
The estimated current rate of non-genital warts among the general population is 1–13%. [1] They are more common among young people. [1] Prior to widespread adoption of the HPV vaccine, the estimated rate of genital warts in sexually active women was 12%. [5] Warts have been described as far back as 400 BC by Hippocrates. [4]
Verrucous carcinoma is a type of squamous cell carcinoma that may be associated with HPV infection (may be subtypes 16 or 18, but types 6 and 11 have also been reported, as have HPV negative variants).
[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 ]
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The manner in which duct tape appears to work is unclear. [1] The tape might create a macerating and keratolytic environment, stimulating an immune response . [ 1 ] The type of adhesive in the duct tape is likely to be important as leeching of the adhesive into the skin may be causing the immune system response. [ 2 ]
The first edition, published in 1917 by the US Public Health Service, titled Control of Communicable Diseases. The first edition was a 30-page booklet with 38 diseases (Public Health Reports 32:41:1706-1733), adopted from a pamphlet written by Dr. Francis Curtis, health officer for Newton, Massachusetts, and sold for 5¢. [ 2 ]