With contributions by numerous expertsPercutaneous Transluminal Angioplasty of the Renal Artery.- Comment Percutaneous Transluminal Angioplasty of the Renal Artery: A Surgeons View By D. C. Brewster.- Comment Percutaneous Transluminal Angioplasty of the Renal Artery: A Hypertensiologists View By E. E. Slater.- Percutaneous Dilatation and Recanalization of Iliac and Femoral Arteries.- Percutaneous Transluminal Angioplasty of Peripheral Vascular Disease: A Two-Year Experience.- Percutaneous Transluminal Angioplasty: A Surgeons View.- Comment Percutaneous Transluminal Angioplasty: Cooperation among Specialties By E. Zeitler.- Transcatheter Vessel Occlusion: Selection of Methods and Materials.- Therapeutic Embolization with Detachable Balloons.- Comment Materials and Methods for Transcatheter Vascular Occlusion: Some Personal, Practical Views.- Editors Note.- Vessel Occlusion with Transcatheter Electrocoagulation.- Comment Vessel Occlusion with Transcatheter Electrocoagulation: Negative Results By K. Amplatz.- Reply By W. M. Thompson and I. S. Johnsrude.- Current Status of Transcatheter Management of Neoplasms.- Comment Current Status of Transcatheter Management of Neoplasms: A Surgeons View By A. M. Cohen.- The Treatment of Hyperparathyroidism by Transcatheter Techniques.- Comment The Treatment of Hyperparathyroidism by Transcatheter Techniques: A Surgeons View By C. Wang.- Reply By J.L. Doppman.- Reply By C. Wang.- Final Remarks The Treatment of Hyperparathyroidism by Transcatheter Techniques: An Endocrinologists View By G. V. Segre.- Splenic Embolization.- Comment Splenic Embolization: A Surgeons View By B. Cosimi.- Transcatheter Embolization versus Vasopressin Infusion for the Control of Arterio-capillary Gastrointestinal Bleeding.- Comment Embolization versus Vasopressin Infusion in Gastrointestinal Bleeding By J. J. Bookstein.- Transhepatic Embolization of Varices.- Comment Transhepatic Embolization of Varices: A Surgeons View By R. A. Malt.- Reply By W. lÓ3