An epidermodysplasia verruciformis patient suffering from generalized warts and a carcinoma at the forehead was found to be infected by at least six types and subtypes of human papillomaviruses. The central part of the carcinoma, however, harbored only human papillomavirus 5 DNA. The DNA persisted extrachromosomally in high genome copy number. In contrast to wart DNA preparations, a significant part of the viral sequences in the carcinoma was present as oligomers, at least part of them being concatemers as shown by S1 digest. The human papillomavirus 5 subtype from this carcinoma was compared with the two other carcinoma isolates described so far and proved to be rather similar.


This work was supported by the Deutsche Forschungsgemeinschaft (SFB 31: Tumorentstehung und -Entwicklung).

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