Figure 1

TrkB expression at the tumour centre and tumour margin. The representative images from two cases with higher TrkB at the invasive front were shown. Figures (A and B) or (C and D) were from the same patient. TrkB expression at the tumour margin (B and D) was higher than that of the tumour centre (A and C) in the patient with both differentiated adenocarcinoma histology (A and B) and undifferentiated adenocarcinoma histology (C and D).