Somatostatin Analogues.- Somatostatin Analogues: Mechanisms of Action.- Somatostatin Analogues in Pituitary Adenomas.- Effects of Sandostatin on Neuroendocrine Tumours of the Gastrointestinal System.- Somatostatin Analogues in the Treatment of Pancreatic Neoplasia.- Somatostatin and Somatostatin Analogues in Human Breast Carcinoma.- Somatostatin Analogues and Small-Cell Lung Carcinoma.- Somatostatin and Neoplastic Pain.- Bombesin Antagonists.- Bombesin Receptor Antagonists: Different Classes and Cellular Basis of Action.- Bombesin Antagonists: Experimental and Clinical Results.