Primary tissue culture of spontaneously regressing flat warts. In vitro attack by mononuclear cells against wart‐derived epidermal cells

Although tumors may be resolved due to host immune response, it is difficult to obtain direct evidence of this in man. Numerous flat warts, human papilloma virus type 3‐induced papillomas, disappear systemically and simultaneously after showing inflammatory changes. Histologically, there is a dense...

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