Gastrointestinal Pathology

There have been many advances in the field of gastrointestinal pa­ thology which are of considerable clinical significance during the 13 years since the last publication of a volume of Current Topics in Pathology devoted to this subject. Many have arisen from the app­ lication of new techniques of histochemistry, immunocytochemi­ stry, quantitative morphometry and molecular and cell biology to gastrointestinal diseases, but some, notably the recognition of the association of Campylobaeter pyl