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Table 3 Number, percentage and mean duration of the malignant transformation for the 219 potentially malignant oral epithelial lesions with different histological diagnoses

From: Malignant transformation in 5071 southern Taiwanese patients with potentially malignant oral mucosal disorders

Histological diagnosis Malignant transformation Mean duration of malignant transformation
  N (%) (months)
Epithelial dysplasia with oral submucous fibrosis 9/186 (4.84) 42.47
Epithelial dysplasia with hyperkeratosis or epithelial hyperplasia 63/957 (6.58) 27.86
Oral submucous fibrosis 37/994 (3.72) 37.42
Lichen planus 2/381 (0.52) 8.07
Verrucous hyperplasia 59/869 (6.79) 33.49
Hyperkeratosis or epithelial hyperplasia 49/1684 (2.91) 36.55
Overall 219/5071 (4.32) 33.56