Abstract
We evaluated micronuclei and other nuclear anomalies in exfoliated epithelial cells of the oral cavity on the side opposite the lesion targeted by radiotherapy and correlated them with radiation doses. Buccal smears were obtained from oral cancer patients undergoing radiotherapy with a cumulative dose of at least 1000 rad for 3 weeks and from controls matched for age, gender and habits. The exfoliated cells from the mucosa were collected using a cytobrush; smears were prepared, fixed in 80% methanol and stained using the Feulgen plus fast green method. The mean number of micronuclei and other nuclear anomalies/1000 cells was significantly greater in patients undergoing radiotherapy treatment, but the differences were not significant compared to radiation doses. It appears that radiotherapy has a potent clastogenic effect on buccal mucosal cells of oral cancer patients.
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