Biopsy of the gastrointestinal tract has been revolution less busy) teaching hospital. These sort of techniques, which I confess interest me greatly because of the ized by the introduction of fibreoptics; the proximal additional information which they can yield when rightly reaches, as far as the second part of the duodenum, and chosen, are naturally linked with improved methods of the whole large bowel back to the caecum can now be tissue preservation in general, bearing in mind that the sampled under direct vision and multiple small biopsies need for special techniques often becomes...