21.   We could not show a significant difference between the extent of gastric metaplasia at sites around ulcer craters or scars and macroscopically normal appearing mucosa.

22.   It is concluded that PCNA immunocytochemistry may be used as an operational marker of cell proliferation in normal colonic mucosa.

23.   Histological evaluation showed normal mucosa.

24.   A minimum of four biopsy samples were obtained from each patient from macroscopically normal mucosa at the rectosigmoidal junction, using standard forceps.

25.   Gastroscopy showed a nodular gastric mucosa with apthous ulceration and superficially normal duodenal mucosa.

26.   In all cases, macroscopically and histologically normal adjacent mucosa as well as tumour tissues were examined.

27.   Cell membranes of human colorectal carcinomas and normal mucosa were prepared as described by Maeda et al with minor modifications.

28.   Contamination of isolated cell membranes with intracellular components would therefore probably result in the detection of pre-Beta chains in the normal colonic mucosa.

29.   Twenty patients taking NSAIDs had a histologically normal antral gastric mucosa.

30.   The proportion of tumours associated with a normal surrounding mucosa showed no significant differences between the two main types.