Figure 2 .

Heterogeneous expression of Bcl-2 in colorectal tumours. (A) Tumour which is negative for Bcl-2 expression while the peritumoural lymphocytes and adjacent mucosa can be seen to be positive. (B) Tumour showing weak but unequivocal expression in most tumour cells. (C) Tumour which is predominantly negative except for focal intense expression. (D) Intense expression can be seen in most tumour cells.