Abstract
Koilocytotic atypia was studied histopathologically in five hund red and one cases of biopsy materials. Two hundred and seven cases had koilocytotic atypia. Inmany specimens the koilocytotic atypia was observed as a focal epithelial change. The 20-39 age group, which made up 29.9% of this age group, was uncommonly affected. Koilocytotic atypia was most common in papillo ma (75.0%) with statistically significant differences in the lesions and high occurence in the lesion ofthe tongue at oral sites. The relation between the results of these findings and its association to viral inf ection of the oral cavity was discussed.
