Table 1.
Incidence of histopathological lesions in tongue of rats in the 4-nitroquinoline 1-oxide model
Groups (weeks) | No. of rats | Lesions | |||
---|---|---|---|---|---|
Normal | Moderate dysplasia | Severe dysplasia | Carcinoma | ||
0 | 16 | 16 | 0 | 0 | 0 |
16 | 16 | 0 | 8 | 8 | 0 |
24 | 16 | 0 | 0 | 4 | 12 |