Tissue / Organ

Expression %

Lung

40-80

Breast

14-91

Stomach

33-74

Colon

25-77

Pancreas

30-50

Prostate

40-80

Kidney

50-90

Ovary

35-70

Head and neck

36-100

Table 1: Frequency of expression of the EGFR in human carcinomas. EGFR belongs to the ERB family of tyrosine kinase receptors. As shown in table 1, a variety of human malignant tumors over-express the EGFR which has been correlated with poor prognosis.