Plantar epidermoid cysts with human papillomavirus (HPV) infection are not rare in Japan. Most of them show the cytopathic effect of HPV type 60 - homogeneous intracytoplasmic inclusion bodies. Our case presented a plantar epidermoid cyst with vacuolation around the granular cell layer without any features of HPV type 60. In situ hybridization and polymerase chain reaction followed by DNA sequencing analysis revealed an association with HPV type 57.
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Kashima et al. (2003) studied this question.
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