Objective: The diagnosis of epithelial dysplasia at the surgical margins in oral cancer plays an important role in its prognosis and requires careful evaluation. Epithelial dysplasia is usually asymptomatic, but often associated with recurrence and malignant transformation. Patients and Methods: The patients included 9 men and 5 women (mean age, 54.6 years; range, 31 to 76 years) with early tongue carcinoma and tumour-cell-“free” surgical margins. Immunohistochemical analysis of p53 and Ki-67 expression was performed in order to evaluate epithelial dysplasia and pathological changes. Results: None of the patients had cancer recurrence, but 2 showed recurrence of epithelial dysplasia. The resection margins at initial surgery and at recurrence were positive for p53 and Ki-67 in both these patients. Conclusions: Epithelial dysplasia, with positive staining for p53 and Ki-67, has the potential for morphological changes, with possible recurrence of epithelial dysplasia or malignant transformation. Such patients will require careful follow-up for local recurrence. Examination of surgical margins for these markers is useful for the early detection of pathological changes.