The lower urinary tract has been the subject of intensive investigation for the past decade, during which notable advances have been made particularly in the field of instrumental diagnosis and treatment. With increasing application, certain limitations of these procedures became apparent indicating the need for a supplementary method by which a clearer conception of form and function could be obtained. Urethrocystography fulfils this need and should be used as a part of the routine examination of patients presenting certain lesions of these organs.
Although, in our hands, urethrography has proved a valuable diagnostic procedure, its scope is limited as it fails to demonstrate pathologic conditions other than those confined to the urethra and its adnexa. Cystography, while more extensively employed and better understood, also has its limitations. Because of the close anatomic and functional relationship of the posterior urethra, adnexa, vesical neck and bladder muscle, a more accurate concept of