[Radiologic diagnosis of mega-ureter in childhood (author's transl)].

For the radiologic diagnosis of mega-ureter the degree of filling of the bladder (bladder-phenomenon) in the IVP has to be considered. A film, after emptying the bladder, prevents mistaken diagnosis. In order to prove reflux a micturition cystogram will always have to be done. The diuretic effect of the contrast medium has to be taken into account. For a differential diagnosis mega-ureter has to be distinguished from functional distension (hypotonia) in the presence of infection or increased diuresis.