Abstract
In the past 10 years, physiological actions and pharmacological effects of gastrointestinal hormones have been demonstrated through established methods in biochemistry, cytology, and immunology. Simultaneously, clinlcal studies have been advanced not only by physicians and surgeons, but also by pediatricians. In this paper, problems of gastrointestinal hormones in infants and children are presented under the five following headings: (1) changes of blood gastrointestinal hormone levels through aging, (2) etiology of congenital hypertrophic pyloric stenosis, (3) clinical pictures showing gastrointestinal hormone-producing tumors, (4) disturbance of passage in the digestive tract, and (5) others
