Table 4: Histopathology of surgical margins where malignant lesions recurred.

Histopathological diagnosis of margins by previous surgeries Numbers (%) of recurrent lesions and intervals (month) until recurrences
Epithelial dyspl asia CIS SCC Total
Mild Moderate
Number( )PeriodNumber( )PeriodNumber( )PeriodNumber( )PeriodNumber( )Period

Normal/hyperplastic epithelia0(0.0) 0.00(0.0) 0.01(50.0) 12.01(50.0) 43.02(100.0)27.5
Epithelial dysplasia1(3.2) 11.05(16.1) 28.48(25.8) 41.817(54.9) 26.131(100.0)30.0
 Mild0 (0.0)0.0 2 (22.2)18.5 2 (22.2)39.0 5 (55.6)8.8 9 (100.0)17.7
 Moderate1 (4.6)11.0 3 (13.6)35.0 6 (27.3)42.7 12 (54.5)33.3 22 (100.0)35.0
CIS0(0.0) 0.00(0.0) 0.015(42.9) 14.120(57.1) 25.135(100.0)20.4
SCC1(6.2) 2.00(0.0) 0.03(18.8) 12.312(75.0) 22.516(100.0)19.3

Total2(2.4) 6.55(6.0) 28.427(32.1) 22.050(59.5) 25.184(100.0)23.9