S.No Lesion No. of cases No. of positive cases Cumulative score
Negative Weakly positive Strongly positive Mean ± SD
  4-Jan >4
0    
Group I              
Benign Pleomorphic adenoma 8 8 - 8 - 1.8 ± 0.64
Malignant Peripheral mucoepidermoid carcinoma 5 5 - 4 1 3.4± 1.95
Central  mucoepidermoid carcinoma 4 4 - 4   2 ± 1.414
Adenocarcinoma nos 2 2 - 2 - 2.5 ± 2.121
PLGA 1 1 - 1 - 1
Total 12 12 - 11 1 2.58 ± 1.72
A total of 20 cases formed the study group out of which Group I (Benign) comprising of 8 cases and group II (Malignant) comprising of 12 cases were each immunohistochemically stained for Bcl-2. All 8 cases of group I was positive and showed weak positivity. In group II, all 12 cases were positive and the expression varied from weak to intense with 1 case showing strong positive Bcl-2 expression. Overall, malignant tumours showed a more intense Bcl-2 expression compared to benign tumours.
Table 1: Malignant tumours showing more intense Bcl-2 immune expression as compared to benign tumours.