highly significantP < 0.0000000002
t-test demonstrated a highly significant difference between healthy mucosa and tumour tissue (P < 0.0000000002), between peritumoral mucosa and British Journal of Cancer (1998) 78(6), 765-770 A 8000- B Ul) 0~ L- '8 .0 78 0) 0~ 6000 4000 2000 - I Healthy mucosa Peritumoral mucosa A- C 30