Abstract
A total of 23 malignant oropharyngeal tumours (palate, tongue, tonsils, pharynx) and two lymph node metastases were analysed for presence of papilloma virus DNA. Thirteen (54.5%) of 22 squamous cell cancers of different koilocytosis and grading were found to contain HPV 16/18 DNA. Only 16.6% (4 cases) were positive for HPV 6/11 DNA. There was no detectable HPV-DNA in the lymph node metastases (Table 1). The control biopsies (19) were negative after hybridisation.
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