A TRANSPARENCY TEST FOR THE DIFFERENTIAL DIAGNOSIS OF PLANTAR WARTS

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Abstract
In most instances it is easy to recognize plantar warts by inspection. The majority of plantar warts are found chiefly on points of pressure and friction and so are often complicated with clavi and calluses. Sometimes the plantar wart is so covered with keratin that its true identity is missed. Shaving off bits of hyperkeratotic material may help in the diagnosis and also serve, of course, as a therapeutic aid. But certain forms of complicating clavi are not seen any more clearly with shaving, and often this shaving is painful. The various hyperkeratotic lesions on the sole or even on the palm are rendered clearer for observation by the application of such a material as alcohol, xylene or oil, which makes the keratin transparent. This is due to penetration of the keratin by the material used and reflection of light through a medium now showing approximately the same index of

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